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Natalya Bailey: Rocket Engines and Electric Spacecraft Propulsion | Lex Fridman Podcast #157


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The following is a conversation with Natalia Bailey,
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a rocket scientist and spacecraft propulsion engineer
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previously at MIT, and now the founder and CTO
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of Axion Systems, specializing in efficient space
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propulsion engines for satellites and spacecraft.
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So these are not the engines that get us
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from the ground on Earth out to space,
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but rather the engines that move us around in space
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once we get out there.
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Quick mention of our sponsors,
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MonkPak, Low Carb Snacks,
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and Sun Basket, meal delivery service.
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So the choice is snacks, caffeine,
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knowledge, or a delicious meal.
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Choose wisely my friends, and if you wish,
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click the sponsor links below to get a discount
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and to support this podcast.
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As a side note, let me say something
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about Natalia's story.
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She has talked about how when she was young,
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she would often look up at the stars and dream
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of alien intelligences that one day
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we could communicate with.
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This moment of childlike cosmic curiosity
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is at the core of my own interest in space
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and extraterrestrial life, and in general,
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in artificial intelligence, science, and engineering.
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Amid the meetings and the papers and the career rat race
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and all the awards, let's not let ourselves
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lose that childlike wonder.
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Sadly, we're on Earth for only a very short time,
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so let's have fun solving some of the biggest puzzles
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in the universe while we're here.
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If you enjoy this thing, subscribe on YouTube,
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review it on Apple Podcast, follow on Spotify,
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support on Patreon, or connect with me
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on Twitter at Lex Freedman.
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And now, here's my conversation with Natalia Bailey.
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You said that you spent your whole life dreaming
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about space and also pondering the big existential question
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of whether there is or isn't intelligent life,
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intelligent alien civilizations out there.
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So what do you think?
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Do you think there's life out there?
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Intelligent life?
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Intelligent life, that's trickier.
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I think looking at the likelihood of a self replicating
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organism given how much time the universe has existed
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and how many stars with planets,
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I think it's likely that there's other life,
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intelligent life.
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I'm hopeful, you know, I'm a little discouraged
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that we haven't yet been in touch.
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Allegedly, I mean, it's also.
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In our dimensions and so on, yeah.
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It's also possible that they have been in touch
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and we just haven't, we're too dumb to realize
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they're communicating with us.
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In whichever, it's this Carl Sagan idea
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that they may be communicating at a time scale
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that's totally different.
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Like their signals are in a totally different time scale
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or in a totally different kind of medium of communication.
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It could be our own, it could be the birth of human beings,
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whatever the magic that makes us who we are,
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the collective intelligence thing,
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that could be aliens themselves,
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that could be the medium of communication.
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Like the nature of our consciousness and intelligence
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itself is the medium of communication.
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And like being able to ask the questions themselves,
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I've never thought of it that way.
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Like actually, yeah, asking the question
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whether aliens exist might be the very medium
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by which they communicate.
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It's like they send questions.
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So some this like collective emergent behavior
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is the signal.
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Is the signal, yeah.
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So.
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Interesting, yeah.
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Cause maybe that's how we would communicate.
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If you think about it, if we were way, way, way smarter,
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like a thousand years from now, we somehow survive,
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like how would we actually communicate?
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In a way that's like, if we broadcast the signal,
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and then it could somehow like percolate
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throughout the universe, like that signal having an impact.
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Multiverse.
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Multiverse, of course, that would have a signal,
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an effect on the most, the highest number
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of possible civilizations.
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What would that signal be?
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It might not be like sending a few like stupid little
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hello world messages.
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It might be something more impactful.
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Where it's almost like impactful in a way
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where they don't have to have the capability to hear it.
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It like forces the message to have an impact.
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Right.
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My train of thought has never gone there, but I like it.
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And also somewhere in there, I think it's implied
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that something travels faster than the speed of light,
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which I'm also really hopeful for.
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Oh, you're hopeful.
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Are you excited by the possibility
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that there's intelligent life out there?
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Sort of you work on the engineering side of things.
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It's this very kind of focus pursuit
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of moving things through space efficiently.
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But if you zoom out, one of the cool things
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that this enables us to do is get even intelligent life,
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just life on Mars or on Europa or something like that.
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Does that excite you?
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Does that scare you?
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Oh, it's very exciting.
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I mean, it's the whole reason I went into the field
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I'm in is to contribute to building the body of knowledge
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that we have as a species.
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So very exciting.
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Do you think there's life on Mars?
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Like no longer, well, already living,
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but currently living, but also no longer living,
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like that we might be able to find life
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as some people suspect, basic microbial life.
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I'm not so sure about in our own solar system.
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And I do think it might be hard to untangle
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if we somehow contaminated other things as well.
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So I'm not sure about this close to home.
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That'd be really exciting.
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Yes.
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Like, do you think about the Drake equation much of like?
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That was what got me into all of this, yeah.
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Yeah, cause one of the questions is how hard is it
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for life to start on a habitable planet?
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Like if you have a lot of the basic conditions,
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not exactly like Earth, but basic Earth like conditions,
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how hard is it for life to start?
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And if you find life on Mars or find life on Europa,
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that means it's way easier.
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That's a good thing to confirm
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that if you have a habitable planet,
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then there's going to be life.
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And that like immediately, that would be super exciting
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because that means there's like trillions of planets
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with basic life out there.
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Though of all the planets in our solar system,
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Earth is clearly the most habitable.
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So I would not be discouraged
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if we didn't find it on another planet
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in our solar system.
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True, and again, that life could look very different.
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It's habitable for Earth like life,
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but it could be totally different.
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I still think that trees are quite possibly
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more intelligent than humans,
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but their intelligence is carried out over time scale
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that we're just not able to appreciate.
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Like they might be running
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the entirety of human civilization
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and we're just like too dumb to realize
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that they're the smart ones.
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Maybe that's the alien message, it's in the trees.
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It's in the trees.
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Yeah, it's not in the monolith
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in the Utah desert, it's in the trees.
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Right, yeah.
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So let's go to space exploration.
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How do you think we get humans to Mars?
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I think SpaceX and Elon Musk will be the ones
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that get the first human setting foot on Mars
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and probably not that long from now
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from us having this conversation.
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Maybe we'll inflate his timeline a little bit,
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but I tend to believe the goals he sets.
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So I think that will happen relatively soon.
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As far as when and what it will take
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to get humans living there in a more permanent way,
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I have a glib answer, which is,
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when we can invent a time machine
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to go back to the early Cold War
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and instead of uniting around sending people to the moon,
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we pick Mars as the destination.
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So really, I say that because there's nothing
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truly scientifically or technologically impossible
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about doing that soon,
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it's more politically and financially
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and those are the obstacles, I think, to that.
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Well, I wonder of when you colonize with more than,
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I say, five people on Mars,
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you have to start thinking about the kind of rules
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you have on Mars.
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And speaking of the Cold War, who gets to own the land?
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You start planting flags,
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and you start to make decisions.
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And SpaceX says this, it's probably a little bit trolly,
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but they have this nice paragraph in their contracts
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where it talks about that human governments on Earth
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or Earth governments have no jurisdiction on Mars.
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Like the rules, the Martians get to define their own rules.
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It sounds very much like the founding fathers
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for this country, that's the kind of language.
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It's interesting that that's in there
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and it makes you think perhaps that needs to be leveraged.
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Like you have to be very clever about leveraging that
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to create a little bit of a Cold War feeling.
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It seems like we humans need a little bit of a competition.
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Do you think that's necessary to succeed
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in getting the necessary investment
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or can the pure pursuit of science be enough?
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No, I think we're seeing right now
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the pure pursuit of science.
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I mean, that results in pretty tiny budgets for exploration.
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There has to be some disaster impending doom
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to get us onto another planet in a permanent way.
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I don't know.
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Financially, I just don't know if the private sector
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can support that, but I don't wish
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that there is some catastrophe coming our way
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that spurs us to do that.
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Yes, I'm unsure what the business model is
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for colonizing Mars.
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Yeah, exactly.
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Yeah, like there is for, we'll talk about satellites.
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There's probably a lot of business models around satellites,
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but there's not enough short term business.
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I guess that's how business works.
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You should have a path to making money
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in the next 10 years.
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Well, and maybe even more broadly
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and looping back to something we said earlier,
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I don't know that getting humans off this planet
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and spreading bacteria is what we're supposed to be doing
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in the first place, so maybe we can go
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but should we, and I'm probably an unusual person
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for thinking that in my industry
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because humans want to explore,
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but I almost wonder, are we putting unnecessary obstacles?
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We're very finicky biological things
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in the way of some more robotic
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or more silicon based exploration.
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And yeah, do we need to colonize and spread?
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I'm not sure.
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What do you think is the role of AI in space?
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Do you, in your work, again, we'll talk about it,
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but do you see more and more of the space vehicles,
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spacecraft being run by artificial intelligence systems
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more than just like the flight control
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but like the management?
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Yeah, I don't have a lot of color to the dreams
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I have about way in the future in AI,
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but I do think that removing,
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you know, it's hard for humans to even make a trip to Mars,
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much less go anywhere farther than that.
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And I think we'll have, you know, more,
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again, I'm probably unusual in having these thoughts,
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but perhaps be able to generate more knowledge
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and understand more if we stop trying to send humans
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and instead, you know, I don't know if we're talking
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about AI in a truly artificial intelligence way
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or AI as we kind of use it today,
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but maybe sending a Petri dish or two of like stem cells
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and some robotic candlers instead
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if we still need to send our DNA
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because we're really stuck on that.
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But if not, you know, maybe not even that Petri dish.
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So I see, I think what I'm saying is, you know,
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I see a much bigger role in the future
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of AI for space exploration.
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It's kind of sad to think that, I mean,
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I'm sure we'll eventually send a spacecraft
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with a efficient propulsion like some of the stuff
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you work on out that travels just really far
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with some robots on it and with some DNA in a Petri dish.
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And then a human civilization destroys itself
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and then there'll just be this floating spacecraft
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that eventually gets somewhere or not.
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That's a sad thought like this lonely spacecraft
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just kind of traveling through space
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and humans are all dead.
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Well, it depends on what the goal is, right?
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Another way to look at it is we've preserved,
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it's like a little time capsule of knowledge, DNA,
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you know, that we've, that will outlive us.
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Oh, that's beautiful.
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Yeah.
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That's how I sleep at night.
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So you also mentioned that you wanted to be an astronaut.
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Yes.
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So even though you said you're unusual in thinking like,
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it's nice here on earth,
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and then we might want to be sending robots up there,
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you wanted to be a human that goes out there.
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Would you like to one day travel to Mars?
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You know, if it becomes sort of more open to civilian travel
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and that kind of thing.
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Like, are you like vacation wise?
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Like if you're talking, if we're talking vacations,
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would you like to vacation on earth or vacation on Mars?
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I wish that I had a better answer, but no.
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I wanted to be an astronaut because I,
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first of all, I like working in labs and doing experiments.
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And I wanted to go to like the coolest lab, the ISS,
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and do some experiments there.
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That's being decommissioned, which is sad,
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but there will be others, I'm sure.
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The ISS is being decommissioned?
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Yes, I think by 2025, it's not going to be in use anymore.
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But I think there are private companies
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that are going to be putting up stations and things.
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So it's primarily like a research lab, essentially.
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Yes.
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Research lab in space, that's a cool way to say it's like
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the coolest possible research lab.
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That's where I wanted to go.
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And now though, my risk profile has changed a little bit.
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I have three little ones and I won't be in the first thousand
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people to go to Mars, let's put it that way.
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Yeah, earth is kind of nice.
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We have our troubles, but overall it's pretty nice.
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Again, it's the Netflix.
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Okay, let's talk rockets.
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How does a rocket engine work?
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Or any kind of engine that can get us the space
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or float around in space?
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The basic principle is conservation of momentum.
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So you throw stuff out the back of the engine
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and that pushes the rocket and the spacecraft
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in the other direction.
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So there are two main types of rocket propulsion.
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The one people are more familiar with is chemical
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because it's loud and there's fire.
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And that's what's used for launch and is more televised.
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So in those types of systems, you usually have a fuel
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on an oxidizer and they react and combust
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and release stored chemical energy.
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And that energy heats the resultant gas
link |
00:17:22.520
and that's funneled out the back through and not
link |
00:17:25.080
the back through and nozzle directed out the back.
link |
00:17:27.720
And then that momentum exchange pushes
link |
00:17:31.160
this basic craft forward.
link |
00:17:32.400
Is there an interesting difference in liquid
link |
00:17:34.080
and solid fuel in those contexts?
link |
00:17:36.760
They're both lumped in the same.
link |
00:17:38.720
So chemical just means that the release of energy
link |
00:17:43.160
from those bonds essentially.
link |
00:17:45.720
So a solid fuel works the same way.
link |
00:17:49.920
And the other main category is electric propulsion.
link |
00:17:52.800
So instead of chemical energy, you're using electrical energy
link |
00:17:56.840
usually from batteries or solar panels.
link |
00:18:00.680
And in this case, the stuff you're pushing out the back
link |
00:18:05.960
would be charged particles.
link |
00:18:07.800
So instead of combustion and heat,
link |
00:18:11.560
you end up with charged particles
link |
00:18:13.840
and you force them out the back of the spacecraft
link |
00:18:16.240
using either an electrostatic field or electromagnetic.
link |
00:18:20.160
But it's the same momentum exchange
link |
00:18:23.600
and same idea stuff out the back
link |
00:18:25.440
and everything else goes forward.
link |
00:18:27.760
Cool, so those are the big two categories.
link |
00:18:30.160
What's the difference maybe in like the challenges of each,
link |
00:18:39.280
the use cases of each and how they're used today,
link |
00:18:43.760
the physics of each and where they're used,
link |
00:18:47.280
all that kind of stuff.
link |
00:18:48.240
Anything interesting about the two categories
link |
00:18:49.920
that distinguishes them
link |
00:18:51.520
besides the chemical one being the big sexy flames and.
link |
00:18:56.640
Yeah, fire.
link |
00:18:57.800
Fire, yeah.
link |
00:18:59.640
Chemical is very well understood in its simplest form.
link |
00:19:05.800
It's like a firework.
link |
00:19:07.000
So it's been around since 400 BC or something like that.
link |
00:19:12.080
So even the big engines are quite well understood.
link |
00:19:15.040
I think one of the last gaps there is probably
link |
00:19:23.640
what exactly are the products of combustion,
link |
00:19:27.400
our modeling abilities kind of fall apart there
link |
00:19:32.520
because it's hot and gases are moving
link |
00:19:35.520
and you end up kind of having to venture
link |
00:19:40.520
into lots of different interdisciplinary fields of science
link |
00:19:46.800
to try to solve that and that's quite complex
link |
00:19:49.120
but we have pretty good models
link |
00:19:51.880
for some of the more like emergent behaviors
link |
00:19:54.080
of that system anyways.
link |
00:19:55.160
But that's I think one of the last unsolved pieces
link |
00:20:00.600
and really the kind of what people care about there
link |
00:20:04.760
is making it more fuel efficient.
link |
00:20:07.760
So the chemical stuff, you can get a lot
link |
00:20:11.640
of instantaneous thrust but it's not very fuel efficient.
link |
00:20:15.360
It's much more fuel efficient
link |
00:20:16.560
to go with the electric type of propulsion.
link |
00:20:19.960
So that's where people spend a lot of their time
link |
00:20:23.280
is trying to make that more efficient
link |
00:20:24.880
in terms of thrust per unit of fuel.
link |
00:20:28.280
And then there's always considerations
link |
00:20:31.840
like heating and cooling.
link |
00:20:33.680
It's very hot, which is good if it heats the gases
link |
00:20:36.320
but bad if it melts the rocket and things like that.
link |
00:20:40.640
So there's always a lot of work on heating and cooling
link |
00:20:42.640
and the engine cycles and things like that.
link |
00:20:46.600
And then on electric propulsion,
link |
00:20:48.640
I find it like much more refreshingly poorly understood.
link |
00:20:55.960
Well, that's more mysteries.
link |
00:20:57.200
Yeah, I think so.
link |
00:20:58.760
One of the classes I took in college
link |
00:21:02.160
spent, we spent 90% of the class on chemical propulsion
link |
00:21:06.000
and then the last 10% on electric
link |
00:21:07.840
and then professor said like,
link |
00:21:09.400
we only sort of understand how it works
link |
00:21:12.200
but it works kind of and it's like that's interesting.
link |
00:21:15.440
That's what I'm gonna work on.
link |
00:21:16.800
Yeah, and even an ion engine, which is probably
link |
00:21:21.440
one of the most straightforward
link |
00:21:22.720
because it's just an electrostatic engine
link |
00:21:27.440
but it has this really awesome combination
link |
00:21:29.840
of like quantum mechanics and material science
link |
00:21:34.080
and fluid dynamics and electrostatics
link |
00:21:38.160
and it's just very intriguing to me.
link |
00:21:42.400
First of all, can you actually zoom out even more
link |
00:21:44.720
like, because you mentioned ion propulsion engine
link |
00:21:47.920
is a subset of electric.
link |
00:21:51.000
So like maybe, is there a categories of electric engines
link |
00:21:53.520
and then we can zoom in on ion propulsion?
link |
00:21:55.760
Yes, so sure.
link |
00:21:57.720
There's the two most kind of conventional types
link |
00:22:01.480
that have been around since the 60s are ion engines
link |
00:22:04.840
and hall thrusters and ion engines are a little bit simpler
link |
00:22:08.800
because they don't use a magnetic field
link |
00:22:11.440
for generating thrust and then there are also
link |
00:22:17.520
some other types of plasma engines
link |
00:22:19.920
but that don't fit into those two categories.
link |
00:22:21.920
So just kind of other plasma like a Vazimir engine
link |
00:22:26.280
which we could get into and then those are probably
link |
00:22:30.960
the main three categories that would be fun to talk about.
link |
00:22:33.720
Oh, and then of course the category of engine
link |
00:22:36.400
that I work on which has a lot of similarities
link |
00:22:39.360
to an ion engine but could be considered
link |
00:22:41.760
its own class called a colloid thruster.
link |
00:22:44.480
Colloid, cool.
link |
00:22:45.520
Okay, so what is an ion propulsion ion engine?
link |
00:22:48.880
Okay, so in an ion engine you have an ionization chamber
link |
00:22:54.240
and you inject the propellant into that chamber
link |
00:22:57.560
and this is usually a neutral gas like xenon or argon.
link |
00:23:03.600
So you inject that into the chamber
link |
00:23:04.960
and you also inject a stream
link |
00:23:09.240
of really hot high energy electrons
link |
00:23:12.200
and everything's just moving around very randomly in there
link |
00:23:16.560
and the whole goal is to have one of those electrons
link |
00:23:21.240
collide with one of those neutral atoms
link |
00:23:24.080
and turn it into an ion.
link |
00:23:25.920
So kick off a secondary electron and now you have
link |
00:23:29.360
Plasma.
link |
00:23:30.200
Yes, okay.
link |
00:23:31.480
And now you have a charged xenon or argon ion
link |
00:23:39.680
and more electrons and so on.
link |
00:23:42.000
And then some fraction of those ions will happen
link |
00:23:46.960
to make it to this downstream electric field
link |
00:23:50.600
that we set up between two grids with holes in them.
link |
00:23:53.880
And in terms of area, the same amount of those ions
link |
00:23:58.200
also runs into the walls and lose their charge
link |
00:24:01.680
and that's where some of the inefficiencies come in.
link |
00:24:04.480
But the very lucky few make it to those holes in that grid
link |
00:24:09.000
and there are two grids actually
link |
00:24:11.200
and you apply a voltage differential between them
link |
00:24:14.440
and that sets up an electric field
link |
00:24:17.120
and a charged particle in an electric field creates a force.
link |
00:24:21.240
And so those ions are accelerated out the back of the engine
link |
00:24:24.920
and the reaction force is what pushes the spacecraft forward.
link |
00:24:31.200
If you're following along and tallying these charges,
link |
00:24:35.520
now we've just sent a positive beam of ions
link |
00:24:39.720
out the back of the spacecraft.
link |
00:24:42.000
And for our purposes here, the spacecraft is neutral.
link |
00:24:45.680
So eventually those ions will come back
link |
00:24:48.960
and hit the spacecraft because it's a positive beam.
link |
00:24:51.560
So you also have to have an external cathode producer
link |
00:24:56.320
of electrons outside the engine
link |
00:24:58.800
that pumps electrons into that beam and neutralizes that.
link |
00:25:02.320
So now it's net neutral everywhere
link |
00:25:04.000
and it won't come back to the spacecraft.
link |
00:25:05.320
So that's an ion engine.
link |
00:25:07.840
What temperature are we talking about here?
link |
00:25:09.800
So in terms of like the chemical based engines,
link |
00:25:13.040
those are super hot.
link |
00:25:14.880
You mentioned plasma here, how hot does this thing get?
link |
00:25:20.160
I mean, is that an interesting thing to talk about
link |
00:25:22.120
in a sense that is that an interesting distinction
link |
00:25:25.280
or is heat, I mean, it's all gonna be hot?
link |
00:25:28.320
No, so it's important, especially for some
link |
00:25:31.440
of these smaller satellites,
link |
00:25:32.840
people are into launching these days.
link |
00:25:35.320
So it's important because you have the plasma
link |
00:25:39.280
but also those high energy electrons are hot
link |
00:25:42.400
and if you have a lot of those that are going
link |
00:25:46.000
into the walls, you do have to care about the temperature.
link |
00:25:48.240
So having trouble remembering off the top of my head,
link |
00:25:52.560
I think they're at like a hundred electron volts
link |
00:25:55.000
in terms of the electron energy.
link |
00:25:56.840
And then I'd have to remember
link |
00:25:58.880
how to convert that into Kelvin.
link |
00:26:00.760
Can you stick your hand in it?
link |
00:26:02.240
Is that not temperature?
link |
00:26:03.680
Not recommended, yeah.
link |
00:26:05.680
So what's a colloid engine?
link |
00:26:07.720
So the same rocket people that came up with these ideas
link |
00:26:16.200
for electric propulsion probably in the middle
link |
00:26:19.560
of last century also realized
link |
00:26:23.360
that there's one more place to get charged particles
link |
00:26:27.200
from if you're going to be using electric propulsion.
link |
00:26:30.400
So you can take a gas and you can ionize it
link |
00:26:33.280
but there are also some liquids,
link |
00:26:35.800
particularly ionic liquids, which is what we use
link |
00:26:38.680
that you also can use as a source of ions.
link |
00:26:42.520
And if you have ions and you put them in a field,
link |
00:26:44.680
you generate a force.
link |
00:26:45.640
So they recognize that but part of being able
link |
00:26:51.280
to leverage that technique is being able to kind of
link |
00:26:55.120
manipulate those liquids on a scale of nanometers
link |
00:26:58.880
or very few microns.
link |
00:27:01.280
So the diameter of a human hair or something like that.
link |
00:27:05.360
And in the fifties, there was no way to do that.
link |
00:27:08.680
So they wrote about it in some books
link |
00:27:10.560
and then it kind of died for a little bit.
link |
00:27:12.800
And then with silicon, MEMS, computer processors
link |
00:27:17.960
and when foundry started becoming more ubiquitous
link |
00:27:21.480
and my advisor started at MIT kind of put those ideas
link |
00:27:28.360
back together and was like,
link |
00:27:30.040
hey, actually there's now a way to build this
link |
00:27:32.760
and bring this other technique to life.
link |
00:27:35.680
And so the way that you actually get the ions
link |
00:27:40.920
out of those liquids is you put the liquid
link |
00:27:44.000
in again a strong electric field
link |
00:27:47.200
and the electric field stresses the liquid
link |
00:27:50.240
and you keep increasing the field
link |
00:27:51.800
and eventually the liquid will assume a conical shape.
link |
00:27:57.060
It's when the electric field pressure
link |
00:28:00.280
that's pulling on it exactly balances
link |
00:28:02.760
the liquids own restoring force,
link |
00:28:04.760
which is its surface tension.
link |
00:28:06.840
So you have this balance and the liquid assumes a cone
link |
00:28:10.440
when it's perfectly balanced like that.
link |
00:28:12.400
And at the tip of a cone, the radius of curvature
link |
00:28:16.360
goes to zero right at the tip.
link |
00:28:18.520
And the radius, sorry, the electric field
link |
00:28:22.960
right at the tip of a sharp object would go to infinity
link |
00:28:27.480
because it goes as one over the radius
link |
00:28:31.200
and one over the radius squared.
link |
00:28:33.200
And instead of the electric field going to infinity
link |
00:28:37.440
and maybe like generating a wormhole or something,
link |
00:28:40.960
a jet of ions instead starts issuing
link |
00:28:44.260
from the tip of that liquid.
link |
00:28:46.200
So the field becomes strong enough there
link |
00:28:47.740
that you can pull ions out of the liquid.
link |
00:28:50.480
What is the liquid?
link |
00:28:51.600
We're talking about, there's a bunch of different ones.
link |
00:28:54.560
You can do it with different types of liquids.
link |
00:28:58.480
It depends on how easily you can free ions
link |
00:29:02.060
from their neighbors and if it has enough surface tension
link |
00:29:06.520
so that you can build up a high enough electric field.
link |
00:29:09.080
But what we use are called ionic liquids
link |
00:29:12.380
and they're really just positive.
link |
00:29:14.760
They're very similar to salts,
link |
00:29:16.040
but they happen to be liquid
link |
00:29:17.120
over a really wide range of temperatures.
link |
00:29:19.440
This sounds like really cool.
link |
00:29:21.600
Okay, so how big is the cone over time?
link |
00:29:24.680
What's the size of this cone that generates the ions?
link |
00:29:27.680
So if you have a cone that's emitting pure ions,
link |
00:29:33.120
I can't remember if it's the radius or diameter,
link |
00:29:35.160
but that emission is happening from,
link |
00:29:39.200
of that cone is something like 20 nanometers.
link |
00:29:41.840
Oh, I was imagining something slightly bigger,
link |
00:29:45.360
but so this is tiny, tiny,
link |
00:29:49.280
hence the only being able to do it recently.
link |
00:29:52.120
Yeah, that's right.
link |
00:29:52.960
So this is all controlled by a computer, I guess.
link |
00:29:55.720
Like, or like, how do you control,
link |
00:29:59.360
how do you create a cone that generates ions
link |
00:30:01.600
at a scale of nanometers, exactly?
link |
00:30:04.040
So the kind of main trick to making this work
link |
00:30:08.520
is that physically we manufacture hundreds
link |
00:30:12.680
or thousands of sharp structures
link |
00:30:14.720
and then supply the liquid to the tips.
link |
00:30:17.200
So that does a few things.
link |
00:30:20.240
It makes sure that we know where the ion beams are forming
link |
00:30:23.040
so we can put holes in the grid above them
link |
00:30:25.280
to let them actually leave instead of hitting, right?
link |
00:30:28.000
Cool.
link |
00:30:29.440
But it also reduces the actual field we have,
link |
00:30:33.000
the voltage we have to apply to create that field
link |
00:30:35.320
because the field will be much stronger
link |
00:30:36.840
if we can already give the liquid a tip to form on.
link |
00:30:41.840
And those tips we form have radii of curvature
link |
00:30:45.280
on the order of probably like single microns.
link |
00:30:50.920
So we are working at a little bit larger scale,
link |
00:30:53.480
but once we create that support
link |
00:30:55.680
and the electric field can be focused at that tip,
link |
00:30:57.960
then the tiny little cone can form.
link |
00:31:00.120
So wait, so there's something in them,
link |
00:31:02.000
there's an already like a hard material
link |
00:31:04.680
that like gives you the base for the cone
link |
00:31:07.120
and then you pouring like liquid over it,
link |
00:31:08.720
whatever that happens.
link |
00:31:09.560
From the bottom, yeah, it's porous.
link |
00:31:10.840
So we actually supply it from the back of the chip
link |
00:31:13.240
and then it wicks.
link |
00:31:14.080
It forms on top on that structure.
link |
00:31:16.360
Yeah.
link |
00:31:17.200
And then you somehow make it like super sharp,
link |
00:31:19.240
the liquid, so the ions can leave.
link |
00:31:24.840
And then we've applied that field to get those ions
link |
00:31:28.520
and that same field then accelerates them.
link |
00:31:31.600
That's awesome.
link |
00:31:32.440
And there's like a bunch of these?
link |
00:31:33.920
Yeah, I should have brought something.
link |
00:31:37.440
So we...
link |
00:31:38.720
You could just pretend that you have some nanometer cones
link |
00:31:41.240
on the table.
link |
00:31:42.080
Actually, you know, kind of about this scale,
link |
00:31:45.040
we build, we call them thruster chips
link |
00:31:47.640
and it's just a convenient form factor
link |
00:31:50.000
and it's a square centimeter.
link |
00:31:51.840
And on each square centimeter today,
link |
00:31:53.760
we have about 500 of the actual physical,
link |
00:31:56.720
we call them emitters, those physical cones.
link |
00:32:00.520
And we're working on increasing that by a factor of four
link |
00:32:04.520
in the coming months.
link |
00:32:05.720
In size or in the density?
link |
00:32:08.080
In the density, the number of emitters
link |
00:32:10.400
within the same square centimeter chip.
link |
00:32:12.360
So that thing, cause I think I've seen pictures of you
link |
00:32:14.440
with like a tiny thing in your hand,
link |
00:32:15.880
that must be the...
link |
00:32:17.400
Okay, so that's an engine.
link |
00:32:19.920
So that is kind of the ionization chamber
link |
00:32:24.440
and thrust producing part of it.
link |
00:32:26.160
What's not shown in that picture is the propellant tank.
link |
00:32:31.800
So we can keep supplying more and more of the liquid
link |
00:32:34.480
to those emission sites.
link |
00:32:36.800
And then we also provide a power electronic system
link |
00:32:40.600
that talks to the spacecraft
link |
00:32:41.880
and turns our device on and off.
link |
00:32:43.880
So that's the colloid engine.
link |
00:32:45.800
That's the core of the colloid engine.
link |
00:32:47.680
It's the way I've been talking about it.
link |
00:32:50.440
It's more of ion electrospray.
link |
00:32:53.240
Colloid tends to mean like liquid droplets
link |
00:32:59.120
coming off of the jet.
link |
00:33:00.560
But if you make smaller and smaller cones,
link |
00:33:03.440
you get pure ions.
link |
00:33:04.880
So we're kind of like a subset of colloid, yes.
link |
00:33:07.480
What aspects of this?
link |
00:33:09.400
You said that it's been full of mystery
link |
00:33:11.360
from the physics perspective.
link |
00:33:13.240
What aspects of this are understood
link |
00:33:15.840
and what are still full of mystery?
link |
00:33:19.680
Yeah, recently we've been understanding
link |
00:33:24.760
the kind of instabilities and stable regimes of,
link |
00:33:30.680
you know, how much liquid do you supply
link |
00:33:32.640
and what field do you apply?
link |
00:33:34.560
And why is it flickering on and off
link |
00:33:38.000
or why does it have these weird behaviors?
link |
00:33:39.760
So that's in the past just couple of years
link |
00:33:41.960
that's become much more understood.
link |
00:33:47.120
I think the two areas that come to mind
link |
00:33:49.280
as far as not as well understood are the boundary between,
link |
00:33:56.280
you know, you have, we actually use
link |
00:34:00.000
kind of big molecular ions.
link |
00:34:03.080
And if you're looking at the molecular scale,
link |
00:34:07.760
you have, you know, some ions that you've extracted
link |
00:34:10.520
and they're in this electric field.
link |
00:34:12.880
One ion, you know, it's a big molecule.
link |
00:34:16.240
It's getting energy from the electric field
link |
00:34:19.280
and some of that energy is going into the bonds
link |
00:34:21.800
and making it vibrate and doing weird things to it.
link |
00:34:24.320
Sometimes it breaks them apart.
link |
00:34:26.520
And then zooming out to the whole beam,
link |
00:34:30.520
the beam has some behaviors as this beam of ions.
link |
00:34:34.800
And there's a big gap between what are those,
link |
00:34:37.920
how do you connect those
link |
00:34:39.840
and how do we understand that better
link |
00:34:42.280
so that we can understand the beam performance of the engine?
link |
00:34:45.840
Is that a theory question or is it an engineering question?
link |
00:34:48.760
Theory, definitely.
link |
00:34:50.160
We're, Axion is a startup and we're more in the business
link |
00:34:54.400
of building and testing and observing and characterizing.
link |
00:34:59.400
And we're not really diving much into that theory right now.
link |
00:35:03.040
Okay, zooming out a little bit on the physics,
link |
00:35:06.280
I apologize for the way too big of a question,
link |
00:35:08.280
but to you from either, you mentioned Axion is,
link |
00:35:13.680
you know, more of sort of an engineering endeavor, right?
link |
00:35:16.720
From a perspective of physics in general,
link |
00:35:19.720
science in general, or the side of engineering,
link |
00:35:22.480
what do you think is the most to you like beautiful
link |
00:35:25.640
and captivating and inspiring idea in this space?
link |
00:35:30.600
In this space, and then I'm gonna zoom out
link |
00:35:33.440
a little bit more, but in this space,
link |
00:35:35.680
I keep budding up against material science questions.
link |
00:35:41.760
So I, over the past 10 years,
link |
00:35:45.040
I feel like every problem or interesting thing
link |
00:35:49.680
I want to work on, if you dig deep enough,
link |
00:35:52.440
you end up in material science land,
link |
00:35:55.520
which I find kind of exciting
link |
00:35:57.840
and it makes me want to dig in more there.
link |
00:36:00.720
And I was just, you know, even for our technology,
link |
00:36:06.320
when we have to move the propellant from the tank
link |
00:36:09.120
to the tip of the emitters,
link |
00:36:10.760
we rely a lot on capillary action
link |
00:36:12.800
and you're getting into wetting and surface energies.
link |
00:36:15.880
At a scale of like, you know.
link |
00:36:17.880
Yeah, I mean, it's, if you look further, it's quantum too,
link |
00:36:22.160
but it all is, you know.
link |
00:36:25.280
Like, capillary action at the quantum level.
link |
00:36:27.880
Yeah, so I would, it all comes back to me,
link |
00:36:31.920
to, you know, material science.
link |
00:36:33.760
There's so much we don't understand at these sizes.
link |
00:36:37.760
And I find that inspiring and exciting.
link |
00:36:43.360
And then more broadly, you know,
link |
00:36:46.000
I remember when I learned that the same equation
link |
00:36:50.040
that describes flow over an airfoil
link |
00:36:53.800
is used to price options, the Black Scholes equation.
link |
00:36:57.480
And it's, you know, just a partial differential equation,
link |
00:37:01.480
but that kind of connectedness of the universe,
link |
00:37:06.520
you know, I don't want to use options pricing
link |
00:37:09.360
and the universe and the same.
link |
00:37:10.840
But you know what I mean, this connectedness,
link |
00:37:12.640
I find really magical.
link |
00:37:15.320
Yeah, the patterns that mathematics reveals
link |
00:37:17.880
seems to echo in a bunch of different places.
link |
00:37:20.360
Yes.
link |
00:37:21.200
Yeah, there's just weirdness.
link |
00:37:22.320
It's like, it really makes you think,
link |
00:37:25.080
I think through definitely living in a simulation,
link |
00:37:27.280
like whoever programmed it.
link |
00:37:29.200
I like that, that's your conclusion.
link |
00:37:30.400
It's using like shortcuts to program it.
link |
00:37:34.360
Like they didn't, they're just copying pieces
link |
00:37:36.480
and codes for the different parts.
link |
00:37:38.200
Yeah, think of something new or just paste from over there.
link |
00:37:41.560
They won't notice.
link |
00:37:42.800
My conclusion from that was,
link |
00:37:44.760
I'm going to go interview for finance jobs.
link |
00:37:47.160
So I had like a little detour.
link |
00:37:49.520
That's the backup option.
link |
00:37:51.760
So in terms of using Colet engines,
link |
00:37:56.040
what's an interesting difference
link |
00:37:58.080
between a propulsion of a rocket from Earth,
link |
00:38:01.760
when you're standing on the ground to orbit,
link |
00:38:04.280
and then the kind of propulsion necessary
link |
00:38:06.920
for once you get out to orbit
link |
00:38:08.480
or to like deep space to move around?
link |
00:38:14.040
Yes, the reason you can't use an engine like mine
link |
00:38:19.040
to get off the ground is,
link |
00:38:22.440
you know, the thrust it generates
link |
00:38:24.800
is instantaneous thrust is very small.
link |
00:38:27.320
But if you have the time
link |
00:38:30.000
and can accumulate that acceleration,
link |
00:38:32.600
you can still reach speeds
link |
00:38:33.960
that are very interesting for exploration
link |
00:38:37.280
and even for missions with humans on them.
link |
00:38:41.600
An interesting direction,
link |
00:38:44.480
I think we need to go as humans,
link |
00:38:47.880
exploring space is the power supplies
link |
00:38:51.320
for electric propulsion are limiting us
link |
00:38:54.600
in that, you know, solar panels are really inefficient
link |
00:38:58.480
and bulky and batteries.
link |
00:39:00.520
I don't know when anybody's ever going to improve
link |
00:39:03.920
battery technology.
link |
00:39:05.320
I know a lot of people that work on that.
link |
00:39:08.640
And nuclear power,
link |
00:39:11.960
we could have a lot more powerful electric propulsion system.
link |
00:39:15.160
So they would be extremely fuel efficient,
link |
00:39:17.440
but more instantaneous thrust
link |
00:39:19.680
to do more interesting missions
link |
00:39:21.360
if we could start launching more nuclear systems.
link |
00:39:24.560
So like something that's powered,
link |
00:39:27.520
nuclear powered, that's the right way to say it.
link |
00:39:32.240
But isn't a small enough container that could be launched?
link |
00:39:36.000
Yeah, so, I mean, as a world,
link |
00:39:39.320
we do launch spacecraft with nuclear power systems on board,
link |
00:39:44.320
but size is one consideration.
link |
00:39:47.200
It hasn't been a big focus.
link |
00:39:48.560
So the reactors and the heaters and everything are bulky.
link |
00:39:53.320
And so they're really only suitable
link |
00:39:54.680
for some of the much bigger interplanetary stuff.
link |
00:39:59.160
So that's one issue, but then it's a whole like
link |
00:40:01.920
rat's nest of political stuff as well.
link |
00:40:05.720
I heard, I think Elon described or somebody,
link |
00:40:09.240
I think it was Elon that described the EV
link |
00:40:12.400
to all electrical vertical takeoff and landing vehicles.
link |
00:40:17.680
So basically saying rockets,
link |
00:40:19.080
obviously Elon is interested in electric vehicles, right?
link |
00:40:22.600
But he said that rockets can't.
link |
00:40:26.120
In the near term, it doesn't make sense
link |
00:40:28.760
for them to be electrical.
link |
00:40:32.560
What do you see a world with the rockets
link |
00:40:35.400
that we use to get into orbit are also electric based?
link |
00:40:39.520
It's possible, you can produce the thrust levels you need,
link |
00:40:43.680
but you need this, a much bigger power supply.
link |
00:40:47.000
And I think that would be nuclear.
link |
00:40:49.240
And the only way people have been able to launch them
link |
00:40:52.080
at all is that they're in a, you know,
link |
00:40:54.120
100 times redundancy safe mode while they're being launched
link |
00:40:58.200
and they're not turned on until they're farther off.
link |
00:41:00.680
So if you were to actually try to use it on launch,
link |
00:41:04.040
I think a lot of people would still have an issue with that,
link |
00:41:06.720
but someday.
link |
00:41:08.200
It's an interesting concept, nuclear.
link |
00:41:11.040
It seems like people, like everybody that works
link |
00:41:13.440
on nuclear power has shown how safe it is
link |
00:41:16.760
as a source of energy.
link |
00:41:18.360
And yet we seem to be, I mean, based on the history,
link |
00:41:23.760
based on the excellent HBO series,
link |
00:41:26.160
I'm Russian with a Chernobyl.
link |
00:41:28.200
It seems like we have our risk estimation
link |
00:41:31.240
about this particular power source is drastically inaccurate,
link |
00:41:35.560
but that's a fascinating idea
link |
00:41:37.720
that we would use nuclear as a source for our vehicles
link |
00:41:42.600
and not just in outer space.
link |
00:41:44.200
That's cool.
link |
00:41:45.040
I'm gonna have to look into that.
link |
00:41:45.880
That's super interesting.
link |
00:41:46.960
Well, just last year,
link |
00:41:49.320
Trump eased up a little bit on the regulations
link |
00:41:52.240
and NASA and hopefully others are starting
link |
00:41:56.120
to pick up on the development.
link |
00:41:57.840
So now is a good time to look into it
link |
00:42:00.240
because there's actually some movement.
link |
00:42:02.280
Is that a hope for you to explore different energy sources
link |
00:42:05.600
that the entirety of the vehicle uses something like,
link |
00:42:10.840
like the entirety of the propulsion systems
link |
00:42:13.040
for all aspects of the vehicle's life travel
link |
00:42:16.960
is the same or electric?
link |
00:42:18.960
Is it possible for it to be the same?
link |
00:42:20.440
Like the coolant engine being used for everything.
link |
00:42:24.280
You could, and you would have to do it in the same way.
link |
00:42:27.400
We do different stages of rockets now
link |
00:42:29.520
where once you've used up an engine or a stage,
link |
00:42:34.520
you let it go because there's really no point
link |
00:42:36.720
in holding onto it.
link |
00:42:37.560
So I wouldn't necessarily want to use
link |
00:42:39.200
the same engine for the whole thing,
link |
00:42:41.680
but the same technology I think would be interesting.
link |
00:42:45.040
Okay, so it's possible.
link |
00:42:46.200
All right, but in terms of the power source.
link |
00:42:49.360
The power source, that's really interesting.
link |
00:42:51.080
But for the current power sources
link |
00:42:52.520
and its current use cases,
link |
00:42:54.040
what's the use case for electric?
link |
00:42:55.640
Like the coolant engine,
link |
00:42:58.920
can you talk about where they're used today?
link |
00:43:01.600
Sure, so chemical engines are still used quite a bit
link |
00:43:06.600
once you're in orbit,
link |
00:43:07.960
but that's also where you might choose instead
link |
00:43:11.040
to use an electric system
link |
00:43:12.480
and what people do with them.
link |
00:43:15.840
And this includes the ion engines
link |
00:43:17.720
and hall thrusters and our engine
link |
00:43:20.400
is basically any maneuvering you need to do
link |
00:43:22.600
once you're dropped off.
link |
00:43:26.240
Even if your only goal was to just stay in your orbit
link |
00:43:30.120
and not move for the life of your mission,
link |
00:43:32.560
you need propulsion to accomplish that
link |
00:43:34.640
because the Earth's gravity field changes
link |
00:43:38.320
as you go around in orbit
link |
00:43:39.520
and pulls you out of your little box.
link |
00:43:42.600
There are other perturbations
link |
00:43:45.200
that can throw you off a bit.
link |
00:43:47.920
And then most people want to do things
link |
00:43:50.760
a little bit more interesting,
link |
00:43:52.040
like maneuver to avoid being hit by space debris
link |
00:43:55.920
or perhaps lower their orbit
link |
00:43:59.000
to take a higher resolution image of something
link |
00:44:01.200
and then return.
link |
00:44:03.040
At the end of your mission,
link |
00:44:05.760
you're supposed to responsibly get rid of your satellite,
link |
00:44:09.520
whether that's burning it up,
link |
00:44:11.800
but if you're in geo,
link |
00:44:13.600
you want to push it higher into graveyard orbit.
link |
00:44:17.440
What's geo?
link |
00:44:19.360
So low Earth orbit and then geo synchronous orbit
link |
00:44:21.960
or geo stationary orbit.
link |
00:44:23.240
And there's a graveyard.
link |
00:44:24.720
Yeah, so those satellites are at like 40,000 kilometers.
link |
00:44:29.360
So if they were to try to push their satellites
link |
00:44:33.120
back down to burn up in the atmosphere,
link |
00:44:35.440
they would need even more propulsion
link |
00:44:37.840
than they've had for the whole lifetime of their mission.
link |
00:44:40.560
So instead they push them higher
link |
00:44:42.400
where it'll take a million years
link |
00:44:44.240
for it to naturally deorbit.
link |
00:44:46.840
So we're also cluttering that higher bit up as well,
link |
00:44:50.240
but it's not as pressing as Leo,
link |
00:44:53.080
which is low Earth orbit,
link |
00:44:54.160
where more of these commercial missions are going now.
link |
00:44:56.360
Well, so how hard is the collision avoidance problem there?
link |
00:44:59.320
You said some debris and stuff.
link |
00:45:00.840
So like how much propulsion is needed?
link |
00:45:03.800
Like how much is the life of a satellite
link |
00:45:05.840
is just like a crap trying to avoid like
link |
00:45:08.600
what if it's in there?
link |
00:45:09.560
I think one of the recent rules of thumb I heard was per year
link |
00:45:16.120
some of these small satellites
link |
00:45:17.520
are doing like three collision avoidance maneuvers.
link |
00:45:21.880
So that's not, yeah,
link |
00:45:24.080
but it's not zero and it takes a lot of planning
link |
00:45:29.360
and people on the ground and none of that really,
link |
00:45:33.840
I don't think right now is autonomous.
link |
00:45:36.280
Oh, that's not good.
link |
00:45:37.640
Yeah, and then we have a lot of folks
link |
00:45:39.920
taking advantage of Moore's law and cheaper spacecraft.
link |
00:45:42.960
So they're launching them up
link |
00:45:44.040
without the ability to maneuver themselves.
link |
00:45:46.040
And they're like, well, I don't know, just don't hit me.
link |
00:45:49.160
And three times a year that could become affordable
link |
00:45:51.600
if it's like, if it gets hit, maybe it won't be damaged
link |
00:45:55.640
kind of thing, that kind of logic.
link |
00:45:57.640
Affordable in that instead of launching one satellite,
link |
00:46:00.920
they'll launch, you know, 20 small ones.
link |
00:46:02.720
Yeah, so if one gets taken out, that's okay.
link |
00:46:05.080
But the problem is that, you know,
link |
00:46:06.560
one good size satellite getting hit,
link |
00:46:09.640
that's like a ballistic event
link |
00:46:11.680
that turns into 10,000 pieces of debris
link |
00:46:14.040
that then are the things that go and hit the other satellites.
link |
00:46:17.440
Yeah.
link |
00:46:18.280
Do you see a world where like in your sense,
link |
00:46:22.360
in your own work and just in the space industry in general,
link |
00:46:25.760
do you see that people are moving towards bigger satellites
link |
00:46:28.160
or smaller satellites?
link |
00:46:29.760
Is there going to be a mix?
link |
00:46:31.200
Like what's, and what do we talk,
link |
00:46:32.600
what does it mean for a satellite to be big and small?
link |
00:46:36.280
What size are we talking about?
link |
00:46:37.120
So big, the space industry prior to, I don't know, 1990,
link |
00:46:44.120
you know, I guess the bulk of the majority of satellites
link |
00:46:46.800
were the size of a school bus
link |
00:46:49.000
and costs a couple billion dollars.
link |
00:46:53.200
And now, you know, our first launches were on satellites
link |
00:46:59.960
the size of shoeboxes that were built by high school students.
link |
00:47:03.040
So that's a very different, you know,
link |
00:47:05.360
to give you the two ends of the spectrum.
link |
00:47:08.760
Big satellites will, I think they're here to stay,
link |
00:47:12.320
at least as far as I can see into the future
link |
00:47:15.640
for things like broadcasting.
link |
00:47:18.720
You want to be able to, you know,
link |
00:47:21.160
broadcast to as many people as possible.
link |
00:47:25.960
You also can't just go to small satellites
link |
00:47:28.840
and say Moore's law for things like optics.
link |
00:47:32.080
So if you have an aperture on your satellite, you know,
link |
00:47:34.720
that just, that doesn't follow Moore's law, that's different.
link |
00:47:37.800
So it's always going to be the size that it will be,
link |
00:47:40.280
you know, unless there's some new physics
link |
00:47:42.080
that comes out that I'm not aware of.
link |
00:47:44.320
But if you need a resolution and you're at an altitude
link |
00:47:46.640
that kind of sets your size of your telescope.
link |
00:47:50.320
But because of Moore's law,
link |
00:47:52.800
we are able to do a lot more with smaller packages
link |
00:47:56.840
and with that, you know, comes more affordability
link |
00:48:00.320
and opening up access to space to more and more people.
link |
00:48:03.800
Well, what's the smallest satellite you've seen go up there?
link |
00:48:06.280
Like, what are the smallest kind, you said shoeboxes.
link |
00:48:09.360
Yeah, so I think, you know, the smallest,
link |
00:48:11.840
the smallest common form factor can fit a softball inside.
link |
00:48:17.680
So that's 10 centimeters on each side.
link |
00:48:21.360
But then there are some companies working on, you know,
link |
00:48:24.440
fractions of that even.
link |
00:48:26.360
And they're doing things like IOT type application.
link |
00:48:30.480
So it's very low, you know, bandwidth type things,
link |
00:48:34.520
but they're finding some niches for those.
link |
00:48:37.320
Do you mean like there's a business,
link |
00:48:38.560
there's a thing to do with them?
link |
00:48:40.480
Yes, either. What do you do with a small satellite like that?
link |
00:48:44.040
You can, you know, track a ship going across the ocean
link |
00:48:48.160
is like, if you need to, if you just pinging something,
link |
00:48:50.960
you know, you can handle that amount of data
link |
00:48:54.320
and those latencies and so on.
link |
00:48:56.200
You have to have propulsion on that.
link |
00:48:57.440
You have to have a little engine.
link |
00:48:58.800
No, those are just, you know, letting fall out of the sky.
link |
00:49:02.720
Okay. Yeah.
link |
00:49:04.320
But what, so what kind of solid lights
link |
00:49:06.440
would you equip a colloid engine on?
link |
00:49:08.960
Anything that's bigger than probably about 20 kilograms,
link |
00:49:13.120
anything that needs to stay up for more than a year
link |
00:49:16.440
or anything somebody spent more than like a hundred K
link |
00:49:19.720
to build are kind of the ways I would think about it.
link |
00:49:21.960
That's a lot of use cases.
link |
00:49:23.600
What's the small set?
link |
00:49:26.120
Like what's category?
link |
00:49:26.960
Small set is actually very big.
link |
00:49:28.560
I think it's like 700 kilograms or,
link |
00:49:32.200
keep hitting my microphone.
link |
00:49:33.880
Maybe a thousand kilograms down to 200 kilograms
link |
00:49:39.120
or people have their own kind of definitions
link |
00:49:42.400
of how they break them up,
link |
00:49:43.360
but small set is still quite large.
link |
00:49:46.040
And then it's kind of also applied as a blanket term
link |
00:49:49.920
for anything that's not a school bus size satellite.
link |
00:49:53.080
We need to get our jargon straight industry.
link |
00:49:56.400
So what, do you see a possible future where, you know,
link |
00:50:00.400
there's a few thousand satellites up there now,
link |
00:50:02.560
a couple of thousand of them functioning?
link |
00:50:05.480
Do you see a future where there's like millions of satellites
link |
00:50:08.800
up in orbit or forget millions, tens of thousands?
link |
00:50:13.040
Which just seems like where the natural trajectory
link |
00:50:16.240
of the way things are going now is going.
link |
00:50:20.160
Tens of thousands, yes.
link |
00:50:22.520
The two, you know, buckets of applications.
link |
00:50:26.400
One is imaging and the other is communication.
link |
00:50:30.520
So imaging, I think that will plateau
link |
00:50:35.160
because one satellite or one constellation
link |
00:50:39.120
can take an image or a video and sell it
link |
00:50:41.280
to, you know, infinity customers.
link |
00:50:44.360
But if you're providing communications
link |
00:50:47.600
like broadband internet or satellite cell
link |
00:50:51.680
or something like that, satellite phone, you know,
link |
00:50:54.400
you're limited by your transponders and so on.
link |
00:50:58.720
So to serve more people, you actually need more satellites
link |
00:51:02.080
and perhaps at the rate, you know, our data consumption
link |
00:51:06.480
and things are going these days.
link |
00:51:08.880
Yeah, I can see tens of thousands of satellites.
link |
00:51:12.760
Can I ask you a ridiculous question?
link |
00:51:14.520
Yes.
link |
00:51:15.400
So I've recently watched this documentary on Netflix
link |
00:51:18.760
about flat earthers that, you know,
link |
00:51:23.280
the people that believe in a flat earth.
link |
00:51:25.960
As somebody who develops propulsion systems
link |
00:51:30.040
for satellites and for spacecraft,
link |
00:51:33.960
what's to use the most convincing evidence
link |
00:51:37.600
that the earth is round?
link |
00:51:40.760
Probably some of the photos taken from the moon.
link |
00:51:48.800
Photos in the moon, okay.
link |
00:51:50.120
So it's not from the satellite space.
link |
00:51:52.960
Yeah, I think seeing that perspective,
link |
00:51:57.560
maybe I'm just, I'm answering too personally
link |
00:52:00.400
because I really love those photos.
link |
00:52:02.960
Because they're beautiful, yeah.
link |
00:52:04.000
I really like the ones that show the moon
link |
00:52:06.400
and the lunar lander and they're taken
link |
00:52:09.920
a little bit farther back.
link |
00:52:10.840
So you see earth and first you're like, wow, that's tiny
link |
00:52:14.280
and we're insignificant and that's kind of sad.
link |
00:52:17.800
But then you see this really cool thing
link |
00:52:19.760
that we landed on another, you know, planetary body
link |
00:52:23.800
and you're like, oh, okay.
link |
00:52:24.920
Can you actually see her?
link |
00:52:25.760
I don't know if I remember this one.
link |
00:52:27.120
Yeah, I'll send you that picture.
link |
00:52:29.240
Because I love the pictures or videos of just earth
link |
00:52:32.360
from more from orbit and so on.
link |
00:52:34.080
That's really beautiful.
link |
00:52:36.280
That's like a perspective shifter.
link |
00:52:38.120
That's the pale blue dot, right?
link |
00:52:39.640
It probably appears tiny.
link |
00:52:41.440
Yeah, and just that, you know,
link |
00:52:43.400
juxtaposition of the insignificance, but.
link |
00:52:46.840
You're another.
link |
00:52:47.680
That's really cool thing, I just love that.
link |
00:52:50.840
That'd be cool.
link |
00:52:51.680
I personally love the idea of humans stepping out of Mars.
link |
00:52:54.440
I'm such a sucker for the romantic notion of that
link |
00:52:57.840
and being able to take pictures from Mars.
link |
00:53:01.400
Next slide.
link |
00:53:02.240
So you would go.
link |
00:53:03.080
I would be, what did you say you said you wouldn't be?
link |
00:53:09.080
Not in the first thousand.
link |
00:53:10.520
The thousand, which it's funny because to me
link |
00:53:14.360
that's brave to be in the first million.
link |
00:53:17.160
I think when the Declaration of Independence
link |
00:53:21.120
was signed in the United States,
link |
00:53:22.640
that was like two million people.
link |
00:53:25.600
So I would like to show up
link |
00:53:27.280
when they're signing those documents.
link |
00:53:29.160
Okay.
link |
00:53:30.000
So maybe the two million.
link |
00:53:31.000
Oh, that's an interesting way to think of it.
link |
00:53:32.840
Cause like then we're like participating
link |
00:53:35.120
as citizenry and defining the direction.
link |
00:53:38.000
So it's not the technical risk.
link |
00:53:41.120
You just don't want to show up somewhere
link |
00:53:43.400
that's like America before.
link |
00:53:46.960
Yeah, because I, from a psychological perspective,
link |
00:53:51.560
it's just going to be a stressful mess
link |
00:53:54.120
as people have studied, right?
link |
00:53:56.240
It's like it's people, most likely the process
link |
00:54:02.040
of colonization like looks like basically a prison.
link |
00:54:07.280
Like you're in a very tight enclosed space with people.
link |
00:54:10.560
And it's just a really stressful environment.
link |
00:54:13.000
You know, how do you select the kind of people
link |
00:54:14.840
that will go and then there'll be drama.
link |
00:54:16.480
There's always drama in this.
link |
00:54:18.120
And I just want to show up when there's some rules.
link |
00:54:21.360
But I mean, you know, it depends.
link |
00:54:22.960
So I'm not worried about the health
link |
00:54:24.360
and the technical difficulties.
link |
00:54:26.080
I'm more worried about the psychological difficulties.
link |
00:54:29.520
And also just not being able to tweet.
link |
00:54:31.320
Like what are you going to, how are you,
link |
00:54:33.640
there's no Netflix.
link |
00:54:34.680
So yeah, maybe not in the first million,
link |
00:54:37.360
but the first hundred thousand.
link |
00:54:39.880
It's exciting to define the direction of a new,
link |
00:54:42.680
like how often do we not just have a revolution
link |
00:54:46.240
to redefine our government?
link |
00:54:48.240
As you know, smaller countries are still doing to this day,
link |
00:54:51.280
but literally start over from scratch.
link |
00:54:54.240
There's just our financial system.
link |
00:54:56.840
It could be like based on cryptocurrency,
link |
00:54:59.680
you could think about like how democracy, you know,
link |
00:55:02.600
we have now the technology that can enable pure democracy.
link |
00:55:06.920
For example, if we choose to do that,
link |
00:55:09.840
as opposed to representative democracy,
link |
00:55:11.560
all those kinds of things.
link |
00:55:12.840
So we talked about two different forms of propulsion,
link |
00:55:16.560
which are super exciting.
link |
00:55:18.040
So the chemical base, that's doing pretty well.
link |
00:55:20.720
And then the electric base is,
link |
00:55:24.480
are there types of propulsion
link |
00:55:26.920
that might sound like science fiction right now,
link |
00:55:29.240
but are actually within the reach of science
link |
00:55:31.280
in the next 10, 20, 30, 50 years
link |
00:55:34.280
that you kind of think about,
link |
00:55:36.000
or maybe even within the space of even just like,
link |
00:55:39.280
like even ion engines,
link |
00:55:43.840
is there like breakthroughs that might 10x the thing,
link |
00:55:46.720
like really improve it?
link |
00:55:48.920
So, you know, the real game changer
link |
00:55:51.840
would be propellant less propulsion.
link |
00:55:55.360
And so every couple of years you see a new,
link |
00:55:58.880
now a startup or a researcher
link |
00:56:01.960
comes up with some contraption for producing thrust
link |
00:56:05.360
that didn't require, you know,
link |
00:56:07.440
we've been talking about conservation of momentum,
link |
00:56:09.600
mass times velocity out the back,
link |
00:56:12.840
mass times velocity forward, yes, exactly.
link |
00:56:15.880
And you have to, you know, carry that up with you
link |
00:56:19.680
or find it on an asteroid or harvest it from somewhere
link |
00:56:22.920
if you didn't bring it with you.
link |
00:56:24.040
So not having to do that would be, you know,
link |
00:56:27.080
one of the ultimate game changers.
link |
00:56:29.760
And I, you know, unless there are new types of physics,
link |
00:56:34.760
I don't know how we do it, but it comes up often.
link |
00:56:37.600
So it's something I do think about.
link |
00:56:39.600
And, you know, the one, I think it's called the Kazmir effect.
link |
00:56:43.760
If you can, if you have two plates
link |
00:56:46.280
and the space between them is on the order of these,
link |
00:56:49.520
like the wavelength of these ephemeral vacuum particles
link |
00:56:53.200
that pop into and out of existence or something.
link |
00:56:56.920
I may be confusing multiple types of propellant less forces,
link |
00:57:01.000
propellant less forces, but that could be real
link |
00:57:07.720
and could be something that we use eventually.
link |
00:57:11.480
We'll be the power source.
link |
00:57:13.120
Yeah, the most recent engine like this
link |
00:57:16.000
that has was just debunked this year,
link |
00:57:19.920
I think in March or something was called the M drive.
link |
00:57:23.240
And supposedly you used a power source.
link |
00:57:26.920
So, you know, batteries or solar panels
link |
00:57:28.880
to generate microwaves into this resonant cavity.
link |
00:57:33.360
And people claimed it produced thrust.
link |
00:57:36.160
So they went straight from this really loose concept
link |
00:57:39.360
to building a device and testing it.
link |
00:57:40.920
And they said, we've measured thrust
link |
00:57:42.920
and sure on their thrust balance, they saw thrust
link |
00:57:45.240
and different researchers built it and tested it
link |
00:57:48.680
and got the same measurements.
link |
00:57:49.920
And so it was looking actually pretty good.
link |
00:57:52.760
No one could explain how it worked,
link |
00:57:54.120
but what they said was that this inside the cavity,
link |
00:57:59.840
the microwaves themselves didn't change,
link |
00:58:02.000
but the speed of light changed inside the cavity.
link |
00:58:04.600
So relative to that, you know, their momentum was conserved.
link |
00:58:10.560
And I don't, you know, whatever.
link |
00:58:15.320
But finally, someone I think at NASA built the device,
link |
00:58:18.480
tested it, got the same thrust, then unhooked it,
link |
00:58:21.200
flipped it backwards and turned it on,
link |
00:58:22.880
but got the same thrust in the same direction again.
link |
00:58:25.360
And so they're like, this is just an interaction
link |
00:58:27.400
with the test set up or, you know,
link |
00:58:29.080
some of the chamber or something like that.
link |
00:58:31.280
So forwarded again, but, you know,
link |
00:58:35.120
it would be so wonderful for everybody
link |
00:58:37.240
if we could figure out how to do it.
link |
00:58:38.640
But I don't know.
link |
00:58:40.200
That's an interesting twist on it
link |
00:58:42.120
because that's more about efficient travel,
link |
00:58:45.560
long distance travel, right?
link |
00:58:46.800
That's not necessarily about speed.
link |
00:58:49.640
That's more about enabling like less.
link |
00:58:52.640
Hook that up to the nuclear power supply.
link |
00:58:56.080
There you go.
link |
00:58:56.920
Okay.
link |
00:58:58.160
But still in terms of speed, in terms of trying to,
link |
00:59:01.960
so there's recently, already I think been debunked
link |
00:59:06.560
or close to being debunked, but the signal,
link |
00:59:10.280
a weird signal from our nearby friends,
link |
00:59:14.280
nearby exoplanets from Proxima Centauri,
link |
00:59:18.960
a signal that's 4.2 light years away.
link |
00:59:22.480
So, you know, the thought is it'd be kind of cool
link |
00:59:28.120
if there's life out there, alien life,
link |
00:59:31.480
but it'd be really cool if it could fly out there and check.
link |
00:59:34.400
And so what kind of propulsion,
link |
00:59:37.040
and do you think about what kind of propulsion
link |
00:59:39.400
allows to travel close to the speed of light
link |
00:59:42.160
or, you know, half the speed of light,
link |
00:59:43.720
all those kinds of things that would allow us
link |
00:59:45.560
to get to Proxima Centauri
link |
00:59:47.040
and that reasonable in a lifetime?
link |
00:59:49.400
You know, there's the project Breakthrough Starshot
link |
00:59:54.720
that's looking at sending those tiny little chipsets there.
link |
00:59:59.800
And like accelerating really fast.
link |
01:00:01.840
Yeah, using a laser.
link |
01:00:03.080
So launching them, and then while they're still
link |
01:00:05.240
relatively close to the earth, you know,
link |
01:00:07.080
blasting them with some, I forget what,
link |
01:00:10.200
even what power level you needed to accelerate them fast enough
link |
01:00:14.640
to get there in 20 years.
link |
01:00:15.480
Super crazy sounding, but a lot of people say
link |
01:00:18.560
that's a legitimate, like it's crazy sounding,
link |
01:00:20.720
but it can actually pull it off.
link |
01:00:22.320
Yeah, I love that project
link |
01:00:24.160
because there are a lot of different aspects.
link |
01:00:26.080
You know, there's the laser,
link |
01:00:27.360
there's how do you then get enough power
link |
01:00:31.280
when you're there to send a signal back.
link |
01:00:33.200
No part of that project is possible right now,
link |
01:00:35.640
but I think it's really exciting.
link |
01:00:38.320
But do you see like human,
link |
01:00:41.920
like a spacecraft with a human on it,
link |
01:00:43.880
so there's like a heavy one,
link |
01:00:45.520
like us inventing new propulsion systems entirely.
link |
01:00:49.120
Like do you ever see that on the radar
link |
01:00:52.320
of propulsion systems like that,
link |
01:00:54.000
or are they completely out there in the impossible?
link |
01:00:57.280
Well, we're going to quickly leave the realm
link |
01:00:59.720
of what I can describe with any credibility,
link |
01:01:03.200
but I think because of special relativity,
link |
01:01:08.080
if we try to accelerate some mass
link |
01:01:10.560
so close to the speed of light,
link |
01:01:12.400
it becomes infinitely heavy
link |
01:01:15.280
and then we just don't,
link |
01:01:17.080
we'd have to like harness a lot of suns to do that.
link |
01:01:20.360
Or, you know, it's just that math doesn't quite work out,
link |
01:01:25.080
but, you know, in my child's,
link |
01:01:29.520
my child like heart,
link |
01:01:30.600
I believe that, you know, we're missing something,
link |
01:01:34.120
whether it's, you know, dark matter or other dimensions.
link |
01:01:38.320
And if you can just have some anti matter
link |
01:01:41.960
and a black hole and then ride that around
link |
01:01:46.640
and somehow, you know, turn that into some.
link |
01:01:49.520
Mess with gravity somehow.
link |
01:01:51.240
Yeah, I feel like we're missing lots of things
link |
01:01:55.520
in this puzzle and that, you know.
link |
01:02:00.080
I wonder how that puzzle, yeah, right.
link |
01:02:01.920
Well, I can speak with confidence
link |
01:02:03.680
as a descendant of Apes
link |
01:02:06.240
that we don't know what the hell we're doing.
link |
01:02:08.480
Yeah.
link |
01:02:09.560
So there's, we're like really confident,
link |
01:02:12.760
like physicists are really confident
link |
01:02:14.720
that we've like got most of the picture down.
link |
01:02:17.440
But it feels like, oh boy,
link |
01:02:20.880
it feels like that we might not even be getting started
link |
01:02:25.400
on some of the essential things
link |
01:02:26.920
that would allow us to engineer systems
link |
01:02:31.320
that would allow us to travel to space much, much faster.
link |
01:02:36.320
Yeah, and there's even things that are much more common place
link |
01:02:41.240
that we can't explain,
link |
01:02:42.520
but we've started to take for granted,
link |
01:02:44.120
like quantum tunneling, you know.
link |
01:02:48.440
Just things like, oh, the electron was here
link |
01:02:50.760
with this energy and now it's here with this energy
link |
01:02:53.240
and it's just tunneling.
link |
01:02:55.680
But so, you know, we're missing a lot of the picture.
link |
01:02:58.120
So yeah, I don't know to, you know,
link |
01:03:02.160
use your same question from earlier.
link |
01:03:03.480
I don't know if you and I will see it,
link |
01:03:05.560
but yeah, someday.
link |
01:03:08.000
You're the cofounder of just like we've been talking
link |
01:03:10.640
about axion systems, it's a,
link |
01:03:14.000
would you say space propulsion company?
link |
01:03:15.960
Yes.
link |
01:03:16.800
Broadly speaking.
link |
01:03:18.560
So how do you, big question,
link |
01:03:22.280
how do you build a rocket company
link |
01:03:25.720
from like a propulsion company
link |
01:03:29.120
from one person from two people to 10 people plus?
link |
01:03:34.120
Plus, and actually, you know,
link |
01:03:37.560
take it to a successful product.
link |
01:03:41.320
Yeah, well, I think the early stage is quite,
link |
01:03:46.320
I'm not supposed to use the word easy
link |
01:03:48.480
when you work in rocket science, but straightforward.
link |
01:03:51.840
When you're working on something, you know, sexy,
link |
01:03:53.920
like an ion engine, it's more straightforward
link |
01:03:57.360
to raise money and get people to come work for you
link |
01:04:00.800
because the vision's really exciting.
link |
01:04:02.280
And actually that's something I would say
link |
01:04:04.640
is very important throughout is a really exciting vision
link |
01:04:10.040
because when everything, you know, goes to crap,
link |
01:04:13.280
you need that to get people getting themselves out of bed
link |
01:04:16.560
in the morning and thinking of the higher purpose there.
link |
01:04:21.440
And, you know, another thing along the way
link |
01:04:24.160
that I think is key in building any company
link |
01:04:27.440
is the right early employees
link |
01:04:31.120
that also have their own networks
link |
01:04:33.800
and can bring in a lot of people that,
link |
01:04:39.240
you know, really make the whole greater
link |
01:04:43.520
than just the sum of the early team.
link |
01:04:46.640
And how do you build that?
link |
01:04:47.600
Like, how do you find people?
link |
01:04:49.360
It's like asking like, how do you make friends?
link |
01:04:52.400
But is there, is it luck?
link |
01:04:55.920
Is there a system?
link |
01:04:57.840
Like how in terms of the people you've connected
link |
01:05:00.520
with the people you've built a company with,
link |
01:05:07.400
is there some thread, some commonality, some pattern
link |
01:05:11.680
that you find to be, to hold for what makes a great team?
link |
01:05:17.720
I think, you know, personally a thread for me
link |
01:05:21.320
has been my network and being able to draw on that a lot
link |
01:05:26.320
but also giving back to it as much as possible
link |
01:05:30.480
in like an unsolicited sort of way,
link |
01:05:32.480
like making connections between people that,
link |
01:05:35.760
you know, maybe didn't ask,
link |
01:05:37.040
but that I think could be really fruitful.
link |
01:05:39.880
And even, you know, weirder than that is just really
link |
01:05:45.920
getting, you know, having weird, uncomfortable conversations
link |
01:05:49.920
with people like at a conference
link |
01:05:51.680
and getting over the small talk quickly
link |
01:05:56.680
and getting to know them quickly
link |
01:05:57.640
and having a relationship that stands out
link |
01:06:00.000
and then being able to call on them later because of that.
link |
01:06:03.680
And I think that's been because I'm introverted
link |
01:06:07.680
and I, you know, want to poke my eyes out
link |
01:06:10.680
instead of go and do small talk.
link |
01:06:12.680
And so I huddle in a corner with one person
link |
01:06:15.680
and, you know, we talk about aliens or things like that.
link |
01:06:18.680
And so, you know, that's all to say that,
link |
01:06:21.680
you know, having a strong network
link |
01:06:23.680
I think is really important, but a genuine one.
link |
01:06:26.680
And let's see, other ways to build a rocket company,
link |
01:06:30.680
kind of making sure you're paying attention
link |
01:06:32.680
to the sweeping trends of the industry.
link |
01:06:34.680
So everybody just cares about cost
link |
01:06:36.680
and being able to get out ahead of that
link |
01:06:40.680
and even more than we ever thought we'd need to
link |
01:06:42.680
as far as what we needed to price our systems at,
link |
01:06:45.680
you know, people for since the start
link |
01:06:49.680
of the US space industry,
link |
01:06:51.680
they've been paying 20, 25 million in adjusted dollars
link |
01:06:55.680
for an ion engine and seeing that now people are going
link |
01:07:00.680
to want to pay 10K for an ion engine
link |
01:07:04.680
and just staying out ahead of that and those kinds of things.
link |
01:07:09.680
So, you know, being out in the industry
link |
01:07:11.680
and talking to as many people as possible.
link |
01:07:13.680
That's crazy. So there's a drive.
link |
01:07:15.680
I mean, I suppose SpaceX really pushed that.
link |
01:07:17.680
It's frustrating for me.
link |
01:07:19.680
So SpaceX really pushed this,
link |
01:07:23.680
the application of, I guess, capitalism
link |
01:07:26.680
of driving the price down of basically forcing people
link |
01:07:30.680
to ask the question, can this be done cheaper?
link |
01:07:34.680
This can lead to big problems, I would say,
link |
01:07:40.680
in the following sense.
link |
01:07:42.680
I see this in the car industry, for example,
link |
01:07:45.680
that people have, it's such a small margin for profit,
link |
01:07:53.680
like they've driven the cost of everything down so much
link |
01:07:56.680
that there's literally no room for innovation
link |
01:07:59.680
for taking risks.
link |
01:08:00.680
So like cars, which is funny because not until Tesla really,
link |
01:08:07.680
which is one of the, in a long, long time,
link |
01:08:10.680
one of the first successful new car companies
link |
01:08:13.680
that's constantly innovating,
link |
01:08:15.680
every other car company is really pouring
link |
01:08:18.680
in terms of their technological innovation.
link |
01:08:21.680
They innovate on design and style and so on,
link |
01:08:24.680
that people fall in love with the look and so on,
link |
01:08:27.680
but it's not really innovation.
link |
01:08:29.680
In terms of the technology,
link |
01:08:31.680
it's really boringly the same thing
link |
01:08:33.680
and they're really afraid of taking risks.
link |
01:08:35.680
And that's a big problem for Rocket Space, too,
link |
01:08:38.680
because if you're cutting out costs,
link |
01:08:40.680
you can't afford to innovate to try out new things
link |
01:08:43.680
and that's definitely true with Ion Engine, right?
link |
01:08:48.680
So how do you compete in this space?
link |
01:08:54.680
Do you, by the way, see SpaceX as a competitor?
link |
01:08:57.680
And what do you say in general about the competition
link |
01:09:00.680
in this space?
link |
01:09:01.680
Is it really difficult as a business to compete here?
link |
01:09:05.680
No, I don't see SpaceX as a competitor
link |
01:09:08.680
and I see them as one day not too long from now
link |
01:09:12.680
a customer, hopefully.
link |
01:09:15.680
I mean, to compete against that,
link |
01:09:18.680
I think you just have to do things in an unconventional way.
link |
01:09:22.680
So bringing silicon MEMS manufacturing to propulsion,
link |
01:09:27.680
you know, NASA doesn't make Ion Engines
link |
01:09:30.680
using a batch mass producible technique.
link |
01:09:34.680
They have one guy that's been making their Ion Engines
link |
01:09:37.680
for 20 years bespoke pieces of jewelry.
link |
01:09:41.680
So bringing things to what you're trying to innovate
link |
01:09:47.680
to make them, in our case, more cost effective
link |
01:09:50.680
was really key.
link |
01:09:52.680
I like the idea of somebody putting out Ion Engines
link |
01:09:55.680
on Etsy.
link |
01:09:57.680
Yeah, my advisor at MIT would, you know,
link |
01:10:00.680
the thruster chip I was holding up,
link |
01:10:01.680
he would wear one as a lapel pin.
link |
01:10:04.680
But in general, just on the topic of SpaceX,
link |
01:10:08.680
you know, 2020 has seen some difficult things
link |
01:10:11.680
for human civilization.
link |
01:10:14.680
And it's been a lot of, first of all, it's an election year.
link |
01:10:17.680
There's been a lot of drama and division about that.
link |
01:10:19.680
There's been riots of a little different reasons,
link |
01:10:24.680
racial division.
link |
01:10:25.680
There's been obviously a virus that's testing
link |
01:10:28.680
the very fabric of our society.
link |
01:10:30.680
But there's been really, for me,
link |
01:10:33.680
these super positive things, which inspiring things,
link |
01:10:36.680
which is SpaceX and NASA doing the first commercial human flight,
link |
01:10:45.680
launching humans to space and did it twice successfully.
link |
01:10:49.680
What is that?
link |
01:10:51.680
Did you get to watch that launch?
link |
01:10:53.680
Did you, what does it make you feel?
link |
01:10:56.680
Do you think this is first days for a new era of space exploration?
link |
01:11:04.680
Yeah, I did watch it.
link |
01:11:06.680
We played it outside on a big screen at our place.
link |
01:11:09.680
And I was a little, you know, they kept saying,
link |
01:11:12.680
Bob and Doug, Bob and Doug.
link |
01:11:14.680
And, you know, astronauts usually are treated
link |
01:11:18.680
with a little bit more fanfare.
link |
01:11:20.680
So it felt very casual, but maybe that was a good thing.
link |
01:11:24.680
Like this is the era of commercial crewed missions.
link |
01:11:29.680
It was a little bit more, what is it?
link |
01:11:33.680
What's his name?
link |
01:11:34.680
Chris Hadfield.
link |
01:11:35.680
Like playing guitar.
link |
01:11:36.680
Yeah.
link |
01:11:37.680
It's more, it's a different flavor to it.
link |
01:11:40.680
Yeah, exactly.
link |
01:11:41.680
More like fun, playful, celebrity type.
link |
01:11:45.680
Yes, exactly.
link |
01:11:46.680
Astronaut versus the aura of the magical,
link |
01:11:51.680
sort of heroic element of the single human representing us in space.
link |
01:11:56.680
Yes.
link |
01:11:57.680
Yeah.
link |
01:11:58.680
I think that's all for the better though.
link |
01:12:00.680
It's so cool that it's such a common place thing now that we send,
link |
01:12:03.680
you know, I can't believe that sometimes I'll have to,
link |
01:12:07.680
you know, you don't even realize that astronauts are coming
link |
01:12:10.680
and going all the time, you know, splashing back down.
link |
01:12:13.680
And it's just so common now, but that's quite magical, I think.
link |
01:12:18.680
So yes, we did watch that.
link |
01:12:20.680
I love, love, love that we finally have that capability,
link |
01:12:24.680
again, to send people to the space station.
link |
01:12:28.680
And it's just really exciting to see the private sector stepping up
link |
01:12:33.680
to fill in where the government has pulled back in the US.
link |
01:12:36.680
And I think pulled back way too soon as far as exploration
link |
01:12:40.680
and science goes, probably pulled back at the right time
link |
01:12:43.680
for commercial things and getting that started.
link |
01:12:47.680
But I'm really happy that it's even possible
link |
01:12:51.680
to do that with private money and companies.
link |
01:12:55.680
Do you like the kind of the model of competition of NASA funding?
link |
01:13:00.680
I guess that's how it works is like they're providing quite a bit
link |
01:13:03.680
of money from the government and then private companies compete
link |
01:13:07.680
to be the delivery vehicles for whichever the government missions
link |
01:13:15.680
like NASA missions.
link |
01:13:16.680
Yes, I think for this type of mission is a little bit kind
link |
01:13:21.680
of straddles commercial and science.
link |
01:13:25.680
So I think it's good, but I do in general feel like we've pulled back
link |
01:13:31.680
too much on, you know, NASA's role in the science and exploration part.
link |
01:13:36.680
And I think our pace is too slow there, you know, for my liking, I suppose.
link |
01:13:42.680
What do you mean?
link |
01:13:43.680
Okay, so do you have, I mean, on the cost thing, do you feel like NASA
link |
01:13:49.680
was a little too bureaucratic in a sense, like too slow, too heavy,
link |
01:13:55.680
cost wise in their effort, like when they were running things purely
link |
01:14:00.680
without any commercial involvement?
link |
01:14:02.680
So I suppose it's more that I just want the government to fund.
link |
01:14:07.680
I see.
link |
01:14:08.680
And maybe NASA's not the best organization to do it rapidly,
link |
01:14:14.680
but I think that, you know, again, depending on the goals,
link |
01:14:19.680
we're just kind of at the very starting point of space exploration
link |
01:14:24.680
and science and understanding.
link |
01:14:28.680
So we should be spending more money there and not less.
link |
01:14:31.680
And other countries are starting to spend more and more,
link |
01:14:34.680
and I think we'll fall behind because of that.
link |
01:14:37.680
So you have quite a bit of experience, first of all,
link |
01:14:40.680
starting a company yourself, but also I saw, maybe you can correct me,
link |
01:14:44.680
but you have quite a bit of knowledge of just the, in general,
link |
01:14:49.680
the startup experience of building companies that you've interacted with people.
link |
01:14:53.680
Is there advice that you can give to somebody, to a founder,
link |
01:14:59.680
cofounder who wants to launch and grow a new company
link |
01:15:04.680
and do something big and impactful in this world?
link |
01:15:09.680
Yes.
link |
01:15:10.680
I would say, you know, like I mentioned earlier,
link |
01:15:14.680
but make sure the vision is something that, you know,
link |
01:15:19.680
will get you out of bed in the morning and will get,
link |
01:15:22.680
and that you can rally other people around you to achieve.
link |
01:15:27.680
Because I see a lot of folks that sort of cared about something
link |
01:15:32.680
or saw a window of opportunity to do something
link |
01:15:35.680
and, you know, startups are hard and more often than not.
link |
01:15:39.680
Just being opportunistic isn't going to be enough
link |
01:15:43.680
to make it through all the really crappy things that are going to happen.
link |
01:15:48.680
So the vision just helps you psychologically to carry through the hardships,
link |
01:15:52.680
you and the team.
link |
01:15:53.680
Yeah, you and the team, yeah, exactly.
link |
01:15:55.680
To kind of younger people interested in getting into entrepreneurship,
link |
01:15:59.680
I would say, you know, stay as close to like first principles
link |
01:16:03.680
and fundamentals as you can for as long as you can.
link |
01:16:07.680
Because really understanding the problems, you know,
link |
01:16:11.680
if it's something scientific or hardware related,
link |
01:16:14.680
or even if it's not, but having a deep understanding of the problem
link |
01:16:19.680
and the customers and what people care about
link |
01:16:22.680
and how to move something forward is more important
link |
01:16:25.680
than taking all of the entrepreneurship classes in undergrad.
link |
01:16:30.680
So being able to think deeply, yeah.
link |
01:16:32.680
Yeah, exactly.
link |
01:16:34.680
Yeah.
link |
01:16:35.680
Have you been surprised about how much like pivoting is involved?
link |
01:16:38.680
Like basically rethinking what you thought initially would be the right direction to go?
link |
01:16:43.680
Or is there if you think deeply enough that you can stick in the same direction for long enough?
link |
01:16:49.680
So our, you know, our guiding star hasn't changed at all.
link |
01:16:55.680
So that's been pretty consistent.
link |
01:16:57.680
But we, within that, we flip flop on so many things all the time.
link |
01:17:03.680
And, you know, to give you one example, it's do you stop and build a first product
link |
01:17:09.680
that's well suited to maybe a smaller, less exciting segment of the market?
link |
01:17:15.680
Or do you stay head down and focus on, you know, the big swing
link |
01:17:21.680
and trying to hit it out of the park right away?
link |
01:17:24.680
And we've flip flopped between that.
link |
01:17:26.680
And there's not a blanket answer and there are a lot of factors, but that's a hard one.
link |
01:17:32.680
And I think one other piece for the aspiring founder,
link |
01:17:39.680
spending a lot of time and effort on the culture and people piece is so important
link |
01:17:47.680
and is always an afterthought and something that I haven't really seen
link |
01:17:54.680
like the founders or executives that companies purposefully carve out time
link |
01:18:00.680
and acknowledge that, yes, this is going to take a lot of my time and resources.
link |
01:18:06.680
But you see them after the fact trying to repair the, you know, bro culture
link |
01:18:10.680
or whatever else is broken at the company.
link |
01:18:13.680
And I think that it's starting to change.
link |
01:18:15.680
But just to be aware of it from the beginning is important.
link |
01:18:18.680
Right.
link |
01:18:19.680
I guess it should be part of the vision of what kind of place you want to create
link |
01:18:23.680
or what kind of, like, human beings.
link |
01:18:27.680
Yeah, exactly.
link |
01:18:28.680
Like, you can't wait five, ten years and then just slap an HR person on to trying to fix it.
link |
01:18:34.680
Like, it has to be thoughtful from the beginning.
link |
01:18:37.680
Yeah.
link |
01:18:38.680
Don't get me started on HR people.
link |
01:18:42.680
Don't leave HR to HR people, but I'll just leave it at that.
link |
01:18:46.680
You didn't say that.
link |
01:18:47.680
I said it.
link |
01:18:48.680
Okay.
link |
01:18:49.680
Yeah.
link |
01:18:50.680
HR's actual HR is really important.
link |
01:18:53.680
This is so important.
link |
01:18:55.680
Yes, but so important.
link |
01:18:56.680
Culture is so important.
link |
01:18:57.680
Yeah.
link |
01:18:58.680
And then I also was surprised, like, I thought you could say, here will be our culture and
link |
01:19:05.680
our values and that it was kind of distinct from who I and my co founder were as people.
link |
01:19:10.680
And I was like, no, that's not how that works.
link |
01:19:12.680
Yeah.
link |
01:19:13.680
We just kind of like ooze out our behaviors and then the company grows around that.
link |
01:19:17.680
So you have to do a lot of, like, introspection and self work to not end up with a shitty
link |
01:19:23.680
culture.
link |
01:19:24.680
It's kind of a, it's a, it's a relationship, but it's supposed to relationship with two
link |
01:19:29.680
people.
link |
01:19:30.680
It's a relationship with many people.
link |
01:19:31.680
Yeah.
link |
01:19:32.680
And you, yeah, you communicate so much indirectly by who you are.
link |
01:19:35.680
You have to be.
link |
01:19:36.680
Yes.
link |
01:19:37.680
You have to live it.
link |
01:19:38.680
Yeah.
link |
01:19:39.680
As somebody, I think about this a lot cause generally I'm full of love and all those
link |
01:19:45.680
kinds of things.
link |
01:19:46.680
But like, I also get like really passionate.
link |
01:19:50.240
And when I see somebody in the context of work, especially when I see somebody who I
link |
01:19:56.240
know can do a much better job and they don't do a great job, I can lose my shit in a way
link |
01:20:03.320
that's like Steve Jobsian.
link |
01:20:07.000
And you have to think about exactly the right way to lose your shit.
link |
01:20:10.800
If you're going to, or if at all, you have to really think through that cause it sends
link |
01:20:15.440
a big signal.
link |
01:20:16.440
You know, sometimes that's okay, like if you do it deliberately, like if you're going
link |
01:20:21.720
to do it deliberately, if you're going to say like, I'm going to be the kind of person
link |
01:20:25.560
that allows this and pays the cost of it, but you can't just think it's not going to
link |
01:20:29.440
have a cost.
link |
01:20:30.440
Yes.
link |
01:20:31.440
This was like the first thing I worked on with my leadership coach was to how not to
link |
01:20:37.800
just snap people when they were being an idiot.
link |
01:20:42.240
And first I got really good at apologizing.
link |
01:20:46.720
That was the first step because it was going to take longer to fix the behavior.
link |
01:20:51.880
And then she, I've got, I'm actually a lot better at it now and it started with things.
link |
01:20:56.280
She's like, every time you walk through a doorway, think, you know, calm and take breaths
link |
01:21:02.240
before responding.
link |
01:21:03.240
And there were all sorts of these little things we did and it was mostly just changing the
link |
01:21:07.600
habit.
link |
01:21:08.600
Yeah.
link |
01:21:09.600
Yeah.
link |
01:21:10.600
Oh boy, it's a long road.
link |
01:21:13.000
Okay.
link |
01:21:14.000
Yeah.
link |
01:21:15.000
So people love it when we talk about books.
link |
01:21:18.320
Is there books, maybe three or so, technical fiction philosophical that had an impact on
link |
01:21:23.600
your life and you might recommend?
link |
01:21:26.560
And for each, is there an idea or so that you take away from it?
link |
01:21:31.600
Yes.
link |
01:21:32.600
So I've been a voracious reader all my life and I'm always reading like three or four
link |
01:21:40.080
or five books at a time.
link |
01:21:44.840
And now I use Audible a lot too and, you know, podcasts and things like that.
link |
01:21:51.280
So I think the first one that stands out to me is 10, it's a novel, Tender is the Night
link |
01:21:57.280
by Fitzgerald.
link |
01:21:59.120
And I, I read it when I was much younger, but I went back and read it recently and it's
link |
01:22:04.080
not that good, so I'm not sure why it has like such an important place in my literary
link |
01:22:10.760
history, but I love Fitzgerald as an author because he's very, he has very like flowery
link |
01:22:16.920
prose that I can just picture what he's saying, but he does it in such a creative way.
link |
01:22:25.880
I remember that one in particular because it, you know, I read a ton as a kid too, but
link |
01:22:30.800
it kind of set me is like the beginning of my adult reading life and getting into classics
link |
01:22:38.840
and I kind of, I do feel like they seem intimidating maybe.
link |
01:22:45.440
And then I realized that they're all just like love stories.
link |
01:22:50.960
So yeah, isn't everything, you know, yeah, it's really, even, you know, I don't know,
link |
01:22:58.120
I was surprised that even like a lot of the Russian authors, you know, they're all just
link |
01:23:03.680
love stories.
link |
01:23:04.680
Which humans are pretty simple, there's not much to work with.
link |
01:23:08.560
So I think maybe that was it.
link |
01:23:09.680
It made like that whole world less intimidating to me and cemented my love for reading.
link |
01:23:17.320
People should have just approached the classics like, there's probably a love story in here.
link |
01:23:23.160
Somehow it boils down to a chick flick, so just relax and enjoy the ride.
link |
01:23:27.720
And then changing gears quite a bit.
link |
01:23:33.880
The beginning of Infinity, do you know it by David Deutsch?
link |
01:23:37.480
So he's a physicist at Cambridge or Oxford.
link |
01:23:41.920
And so I was introduced like more formally to a lot of the ideas, like a lot of the things
link |
01:23:47.480
we've talked about, he has a lot more like formalism and physics rigor around.
link |
01:23:55.280
And so I got introduced to, you know, more like jargon of how to think about some of
link |
01:23:59.920
these ideas, you know, like memes and, you know, DNA as, as ultimate meme, the concept
link |
01:24:11.120
of infinity and objective beauty, but he has a really strong grounding in physics.
link |
01:24:19.600
And then there's a rigorous way of talking about these like big topics.
link |
01:24:23.440
So that was very mind opening to me to read that.
link |
01:24:28.200
But it also, I think it's probably part of why I ended up marrying my husband is related
link |
01:24:32.920
to that book.
link |
01:24:33.920
And then I've had some other really great connections with people because I had read
link |
01:24:38.240
it and so had they turn that, that book, even that book into a love story.
link |
01:24:44.080
I did.
link |
01:24:45.080
I know.
link |
01:24:46.080
It's good.
link |
01:24:47.080
It's good.
link |
01:24:48.080
Your robot has a heart.
link |
01:24:50.760
And okay, the third series is, it's just, it's Harry Potter, of course, which somehow
link |
01:24:58.880
connects to, I haven't read Harry Potter.
link |
01:25:01.160
I'm really sorry.
link |
01:25:02.480
I forgive me, forgive me.
link |
01:25:05.800
But I've read Tolkien, but just Harry Potter, just haven't, haven't gotten to it.
link |
01:25:10.040
But your company name is somehow, I think, connected to Harry Potter, right?
link |
01:25:13.840
Yes.
link |
01:25:14.840
I think they heard this.
link |
01:25:15.840
I always feel like I have to justify my fandom.
link |
01:25:22.720
The first three books came out when I was 10.
link |
01:25:25.120
So I went along this journey with Harry, age wise, and I read them all like nine or
link |
01:25:33.040
10 times all seven books.
link |
01:25:35.480
And I think anything that just keeps you reading is, is what's important.
link |
01:25:41.720
And you know, there, I have lulls where I don't feel like reading anything.
link |
01:25:44.640
So I'll reread a Harry Potter or a, you know, trashy detective novel or something.
link |
01:25:51.480
And I don't really care.
link |
01:25:52.480
And that's why I mentioned Harry Potter, because it, you know, whatever just keeps
link |
01:25:57.980
me reading, I think is important.
link |
01:25:59.960
And it was a big part of my life growing up.
link |
01:26:02.840
And then yes, Axion, the official story of the naming of the company is that Axion is
link |
01:26:11.480
like a concatenation of accelerate and Ion, but it actually came from Accio, the summoning
link |
01:26:18.320
charm.
link |
01:26:19.320
And then we just added an N and it was perfect.
link |
01:26:22.600
What's the summoning charm?
link |
01:26:23.760
It's just one of the spells and yeah, probably most notably, Harry uses it to summon his
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broomstick out of his dorm room when he's battling a dragon somewhere else.
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So he says the spell and the broomstick comes to him.
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So summoning in that way.
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Okay.
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There we go.
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This is brilliant.
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So the big thing is that it's something that you've carried with.
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It's like your car.
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01:26:51.680
It's your safe place you return to something like the Harry Potter that, you know, I reread
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01:26:57.040
them still.
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01:26:58.800
Whatever keeps me reading, I think is, is the most important thing.
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01:27:02.920
Okay.
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01:27:03.920
I got it.
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01:27:04.920
So yeah, I'm actually the same way in terms of the habit of it.
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01:27:07.760
It's important.
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01:27:08.760
Yeah, it's important to just keep, keep reading.
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01:27:12.760
But I have found myself struggling a little bit to, because I listen to a lot of audiobooks
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01:27:18.200
now.
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01:27:19.200
I've struggled to then switch back to reading seriously, because just read so many papers
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or read so many other things.
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It feels like if I'm going to sit down and have the time to actually focus on the reading,
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I should be reading like blog posts or papers or more condensed kind of things.
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01:27:38.440
Yeah.
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01:27:39.440
But there, there's a huge value to just reading long form still.
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01:27:42.640
Yeah.
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01:27:43.640
And, you know, my husband was never that into fiction, but then someone pulled him or he
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heard, you know, you learn a lot of empathy through reading fiction.
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01:27:55.240
So you could think of it that way.
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01:27:56.440
Oh yeah.
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That's kind of what, yeah.
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01:27:58.440
Yeah.
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01:27:59.440
And it's also fiction is a nice, unlike not less so with nonfiction is a chance to travel.
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I see this kind of traveling.
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01:28:07.720
Yeah.
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01:28:08.720
As you go to this other world and it's, it's nice because it's like much more efficient.
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01:28:12.520
You don't have to get on a plane, you don't have to, and you get to meet all kinds of
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new people.
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01:28:17.920
It's like people say they love traveling and I say I love traveling too.
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01:28:21.280
I just, yeah, read fiction.
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01:28:23.120
I told my three year old that, that was why we read so much because we, you know, see
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01:28:31.040
the places in our mind and I'm like, it's basically like we're watching a movie.
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01:28:35.720
You know, that's how it feels.
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01:28:36.720
And she's like, I prefer watching frozen with popcorn.
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01:28:39.720
Was that your response that you're three?
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01:28:43.400
Yeah.
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01:28:44.400
That's a good point.
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01:28:45.400
Yeah.
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01:28:46.400
But yeah, there's some power to the imagination.
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01:28:47.400
Right.
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01:28:48.400
That's not just like watching a movie because some, something about of our imagination
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01:28:53.160
because it's, it's the words in the world that's painted somehow mixing in with our
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01:28:58.080
own understanding of our own hopes and dreams, our fears, it like mixes up in there in the
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01:29:03.920
way we can build up that world from just the page.
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01:29:07.600
Yeah.
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01:29:08.600
You're, you're really creating the world just with the like prompts from the book.
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01:29:13.080
Right.
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01:29:14.080
Yeah.
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01:29:15.080
Yeah.
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01:29:16.080
That's different than watching a movie.
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01:29:17.080
Yeah.
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01:29:18.080
Which is why it hurts sometimes to watch the movie version and then you're like, that's
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not at all how I imagined it.
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01:29:23.840
Well, we kind of brought this up in terms of the, depending on what the goals are.
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01:29:31.800
Let me ask the big, your friends with Manolis, he's obsessed with this question.
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01:29:36.680
So let me ask the big ridiculous question about the meaning of life.
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01:29:40.560
Do you have, do you ever think about this one?
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01:29:44.160
Do you ever ponder the, the reason we're here, the sense of apes on this spinning ball in
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01:29:52.920
the middle of nowhere?
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01:29:53.920
Yeah.
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01:29:54.920
I don't, I don't think one ends up in the field of space propulsion without thinking
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01:30:00.680
up these existential questions.
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01:30:03.920
Yeah.
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01:30:04.920
All the time.
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01:30:05.920
Or builds a business.
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01:30:06.920
Yeah.
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01:30:07.920
I know.
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01:30:08.920
Right.
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01:30:09.920
Yeah.
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01:30:10.920
We've touched on a lot of the different pieces of this, I think.
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01:30:13.920
So I, I have a bunch of thoughts.
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01:30:18.840
I do think that, you know, the goal isn't, the meaning isn't anymore just to be like a
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01:30:27.760
petri dish of bacteria that reproduces and, you know, where survival and reproduction
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01:30:34.440
are the main objectives.
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01:30:37.240
And maybe it's because now we're able to answer these, ask those questions.
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01:30:43.040
That's maybe the turning point.
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01:30:46.360
And instead, I think it's really the, the pursuit and generation of knowledge.
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01:30:53.280
And so if, if we're taken out by an asteroid or something, I think that it will have been
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01:31:00.680
a, you know, meaningful endeavor if somehow our knowledge about the universe is preserved
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01:31:08.480
somehow and the next civilization isn't starting over again.
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01:31:16.400
So that, that's, that's, I always, yeah, I resonate with that.
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01:31:21.840
I always loved the mission of Google from the early days of making the world's sort
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01:31:27.840
of information and knowledge searchable.
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01:31:30.640
I always loved that idea.
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01:31:31.640
I was loved, I was donated as people should to Wikipedia.
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01:31:37.000
I just love Wikipedia.
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01:31:38.440
I feel like it's the, it, that's one of the greatest accomplishments of just a humanity
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01:31:45.440
of us together, especially Wikipedia and this opens like in this open community way, putting
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01:31:50.400
together different knowledge is like on everything we've talked about today, I'm sure there's
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01:31:54.400
a Wikipedia page about ion engines and I'm sure it's pretty good.
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01:31:59.160
Yeah.
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01:32:00.160
Like it's, I don't know, that's, that's incredible.
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01:32:02.520
And obviously that can be preserved pretty efficiently, at least Wikipedia.
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01:32:06.120
I don't use, you'll be like, the human civilization is all like burning up in flames as there's
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01:32:11.840
this one USB drive slowly traveling out, Wikipedia on it.
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01:32:16.640
Yeah.
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01:32:17.640
That's on from the beginning of our chat that one lonely spacecraft, it just needs Wikipedia
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01:32:24.920
and then it will have been a civilization well spent.
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01:32:28.720
So pushing that knowledge along through like one little discovery at a time is one of,
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01:32:36.040
is a core aspect of the meaning of it, of it all.
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01:32:39.400
Yes.
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01:32:40.400
And I also, I haven't yet figured out what the connection, you know, an explanation I'm
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01:32:46.840
happy with yet for how it's connected, but evolving beyond just the survival piece too,
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01:32:55.280
I think like we touched on the emotional aspect, something in there about cooperation and,
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01:33:03.320
you know, love.
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01:33:04.320
And so I, in my day to day that just boils down to, you know, the pursuit of knowledge
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01:33:11.280
or improving the human condition and being kind.
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01:33:16.800
Love and knowledge.
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01:33:17.800
Yeah.
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01:33:18.800
Exactly.
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01:33:19.800
So I'm pretty at peace with that as the meaning right now makes sense to me.
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01:33:24.280
While you work on a spacecraft proposal.
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01:33:27.280
Yes.
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01:33:28.280
Exactly.
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01:33:29.280
Like literal rocket science.
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01:33:31.760
Natalia, this is amazing conversation.
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You work on such an exciting engineering field.
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01:33:37.040
And I think this is like what 20th, 21st century will be remembered for is space exploration.
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01:33:43.200
So this is exciting space that you're working on.
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01:33:47.480
And thank you so much for spending your time with me today.
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01:33:51.160
Thanks for having me.
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01:33:52.160
This was fun.
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01:33:53.800
Thanks for listening to this conversation with Natalia Bailey.
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01:33:56.280
And thank you to our sponsors, MonkPak Low Carb Snacks, Four Sigmatic Marshmallow Coffee,
link |
01:34:02.560
Blinkist, an app that summarizes books, and Sunbasket, meal delivery service.
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01:34:08.360
So the choice is snacks, caffeine, knowledge, or a delicious meal.
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01:34:13.320
Choose wisely my friends.
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01:34:14.320
And if you wish, click the sponsor links below to get a discount at the support this podcast.
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01:34:20.600
And now let me leave you with some words from Carl Sagan.
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01:34:24.440
All civilizations become either space faring or extinct.
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01:34:28.960
Thank you for listening and hope to see you next time.