back to indexNatalya 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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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, 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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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, yeah.
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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, 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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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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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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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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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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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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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, 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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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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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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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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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
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and that's funneled out the back through and not
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the back through and nozzle directed out the back.
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And then that momentum exchange pushes
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this basic craft forward.
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Is there an interesting difference in liquid
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and solid fuel in those contexts?
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They're both lumped in the same.
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So chemical just means that the release of energy
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from those bonds essentially.
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So a solid fuel works the same way.
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And the other main category is electric propulsion.
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So instead of chemical energy, you're using electrical energy
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usually from batteries or solar panels.
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And in this case, the stuff you're pushing out the back
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would be charged particles.
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So instead of combustion and heat,
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you end up with charged particles
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and you force them out the back of the spacecraft
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using either an electrostatic field or electromagnetic.
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But it's the same momentum exchange
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and same idea stuff out the back
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and everything else goes forward.
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Cool, so those are the big two categories.
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What's the difference maybe in like the challenges of each,
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the use cases of each and how they're used today,
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the physics of each and where they're used,
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all that kind of stuff.
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Anything interesting about the two categories
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that distinguishes them
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besides the chemical one being the big sexy flames and.
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Chemical is very well understood in its simplest form.
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It's like a firework.
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So it's been around since 400 BC or something like that.
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So even the big engines are quite well understood.
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I think one of the last gaps there is probably
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what exactly are the products of combustion,
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our modeling abilities kind of fall apart there
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because it's hot and gases are moving
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and you end up kind of having to venture
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into lots of different interdisciplinary fields of science
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to try to solve that and that's quite complex
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but we have pretty good models
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for some of the more like emergent behaviors
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of that system anyways.
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But that's I think one of the last unsolved pieces
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and really the kind of what people care about there
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is making it more fuel efficient.
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So the chemical stuff, you can get a lot
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of instantaneous thrust but it's not very fuel efficient.
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It's much more fuel efficient
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to go with the electric type of propulsion.
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So that's where people spend a lot of their time
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is trying to make that more efficient
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in terms of thrust per unit of fuel.
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And then there's always considerations
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like heating and cooling.
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It's very hot, which is good if it heats the gases
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but bad if it melts the rocket and things like that.
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So there's always a lot of work on heating and cooling
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and the engine cycles and things like that.
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And then on electric propulsion,
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I find it like much more refreshingly poorly understood.
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Well, that's more mysteries.
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One of the classes I took in college
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spent, we spent 90% of the class on chemical propulsion
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and then the last 10% on electric
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and then professor said like,
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we only sort of understand how it works
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but it works kind of and it's like that's interesting.
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That's what I'm gonna work on.
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Yeah, and even an ion engine, which is probably
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one of the most straightforward
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because it's just an electrostatic engine
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but it has this really awesome combination
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of like quantum mechanics and material science
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and fluid dynamics and electrostatics
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and it's just very intriguing to me.
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First of all, can you actually zoom out even more
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like, because you mentioned ion propulsion engine
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is a subset of electric.
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So like maybe, is there a categories of electric engines
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and then we can zoom in on ion propulsion?
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There's the two most kind of conventional types
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that have been around since the 60s are ion engines
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and hall thrusters and ion engines are a little bit simpler
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because they don't use a magnetic field
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for generating thrust and then there are also
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some other types of plasma engines
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but that don't fit into those two categories.
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So just kind of other plasma like a Vazimir engine
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which we could get into and then those are probably
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the main three categories that would be fun to talk about.
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Oh, and then of course the category of engine
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that I work on which has a lot of similarities
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to an ion engine but could be considered
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its own class called a colloid thruster.
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Okay, so what is an ion propulsion ion engine?
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Okay, so in an ion engine you have an ionization chamber
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and you inject the propellant into that chamber
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and this is usually a neutral gas like xenon or argon.
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So you inject that into the chamber
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and you also inject a stream
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of really hot high energy electrons
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and everything's just moving around very randomly in there
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and the whole goal is to have one of those electrons
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collide with one of those neutral atoms
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and turn it into an ion.
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So kick off a secondary electron and now you have
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And now you have a charged xenon or argon ion
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and more electrons and so on.
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And then some fraction of those ions will happen
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to make it to this downstream electric field
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that we set up between two grids with holes in them.
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And in terms of area, the same amount of those ions
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also runs into the walls and lose their charge
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and that's where some of the inefficiencies come in.
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But the very lucky few make it to those holes in that grid
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and there are two grids actually
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and you apply a voltage differential between them
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and that sets up an electric field
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and a charged particle in an electric field creates a force.
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And so those ions are accelerated out the back of the engine
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and the reaction force is what pushes the spacecraft forward.
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If you're following along and tallying these charges,
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now we've just sent a positive beam of ions
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out the back of the spacecraft.
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And for our purposes here, the spacecraft is neutral.
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So eventually those ions will come back
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and hit the spacecraft because it's a positive beam.
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So you also have to have an external cathode producer
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of electrons outside the engine
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that pumps electrons into that beam and neutralizes that.
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So now it's net neutral everywhere
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and it won't come back to the spacecraft.
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So that's an ion engine.
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What temperature are we talking about here?
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So in terms of like the chemical based engines,
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those are super hot.
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You mentioned plasma here, how hot does this thing get?
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I mean, is that an interesting thing to talk about
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in a sense that is that an interesting distinction
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or is heat, I mean, it's all gonna be hot?
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No, so it's important, especially for some
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of these smaller satellites,
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people are into launching these days.
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So it's important because you have the plasma
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but also those high energy electrons are hot
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and if you have a lot of those that are going
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into the walls, you do have to care about the temperature.
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So having trouble remembering off the top of my head,
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I think they're at like a hundred electron volts
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in terms of the electron energy.
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And then I'd have to remember
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how to convert that into Kelvin.
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Can you stick your hand in it?
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Is that not temperature?
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Not recommended, yeah.
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So what's a colloid engine?
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So the same rocket people that came up with these ideas
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for electric propulsion probably in the middle
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of last century also realized
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that there's one more place to get charged particles
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from if you're going to be using electric propulsion.
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So you can take a gas and you can ionize it
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but there are also some liquids,
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particularly ionic liquids, which is what we use
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that you also can use as a source of ions.
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And if you have ions and you put them in a field,
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you generate a force.
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So they recognize that but part of being able
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to leverage that technique is being able to kind of
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manipulate those liquids on a scale of nanometers
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or very few microns.
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So the diameter of a human hair or something like that.
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And in the fifties, there was no way to do that.
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So they wrote about it in some books
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and then it kind of died for a little bit.
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And then with silicon, MEMS, computer processors
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and when foundry started becoming more ubiquitous
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and my advisor started at MIT kind of put those ideas
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back together and was like,
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hey, actually there's now a way to build this
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and bring this other technique to life.
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And so the way that you actually get the ions
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out of those liquids is you put the liquid
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in again a strong electric field
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and the electric field stresses the liquid
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and you keep increasing the field
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and eventually the liquid will assume a conical shape.
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It's when the electric field pressure
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that's pulling on it exactly balances
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the liquids own restoring force,
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which is its surface tension.
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So you have this balance and the liquid assumes a cone
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when it's perfectly balanced like that.
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And at the tip of a cone, the radius of curvature
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goes to zero right at the tip.
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And the radius, sorry, the electric field
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right at the tip of a sharp object would go to infinity
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because it goes as one over the radius
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and one over the radius squared.
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And instead of the electric field going to infinity
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and maybe like generating a wormhole or something,
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a jet of ions instead starts issuing
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from the tip of that liquid.
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So the field becomes strong enough there
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that you can pull ions out of the liquid.
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What is the liquid?
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We're talking about, there's a bunch of different ones.
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You can do it with different types of liquids.
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It depends on how easily you can free ions
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from their neighbors and if it has enough surface tension
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so that you can build up a high enough electric field.
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But what we use are called ionic liquids
link |
and they're really just positive.
link |
They're very similar to salts,
link |
but they happen to be liquid
link |
over a really wide range of temperatures.
link |
This sounds like really cool.
link |
Okay, so how big is the cone over time?
link |
What's the size of this cone that generates the ions?
link |
So if you have a cone that's emitting pure ions,
link |
I can't remember if it's the radius or diameter,
link |
but that emission is happening from,
link |
of that cone is something like 20 nanometers.
link |
Oh, I was imagining something slightly bigger,
link |
but so this is tiny, tiny,
link |
hence the only being able to do it recently.
link |
Yeah, that's right.
link |
So this is all controlled by a computer, I guess.
link |
Like, or like, how do you control,
link |
how do you create a cone that generates ions
link |
at a scale of nanometers, exactly?
link |
So the kind of main trick to making this work
link |
is that physically we manufacture hundreds
link |
or thousands of sharp structures
link |
and then supply the liquid to the tips.
link |
So that does a few things.
link |
It makes sure that we know where the ion beams are forming
link |
so we can put holes in the grid above them
link |
to let them actually leave instead of hitting, right?
link |
But it also reduces the actual field we have,
link |
the voltage we have to apply to create that field
link |
because the field will be much stronger
link |
if we can already give the liquid a tip to form on.
link |
And those tips we form have radii of curvature
link |
on the order of probably like single microns.
link |
So we are working at a little bit larger scale,
link |
but once we create that support
link |
and the electric field can be focused at that tip,
link |
then the tiny little cone can form.
link |
So wait, so there's something in them,
link |
there's an already like a hard material
link |
that like gives you the base for the cone
link |
and then you pouring like liquid over it,
link |
whatever that happens.
link |
From the bottom, yeah, it's porous.
link |
So we actually supply it from the back of the chip
link |
and then it wicks.
link |
It forms on top on that structure.
link |
And then you somehow make it like super sharp,
link |
the liquid, so the ions can leave.
link |
And then we've applied that field to get those ions
link |
and that same field then accelerates them.
link |
And there's like a bunch of these?
link |
Yeah, I should have brought something.
link |
You could just pretend that you have some nanometer cones
link |
Actually, you know, kind of about this scale,
link |
we build, we call them thruster chips
link |
and it's just a convenient form factor
link |
and it's a square centimeter.
link |
And on each square centimeter today,
link |
we have about 500 of the actual physical,
link |
we call them emitters, those physical cones.
link |
And we're working on increasing that by a factor of four
link |
in the coming months.
link |
In size or in the density?
link |
In the density, the number of emitters
link |
within the same square centimeter chip.
link |
So that thing, cause I think I've seen pictures of you
link |
with like a tiny thing in your hand,
link |
that must be the...
link |
Okay, so that's an engine.
link |
So that is kind of the ionization chamber
link |
and thrust producing part of it.
link |
What's not shown in that picture is the propellant tank.
link |
So we can keep supplying more and more of the liquid
link |
to those emission sites.
link |
And then we also provide a power electronic system
link |
that talks to the spacecraft
link |
and turns our device on and off.
link |
So that's the colloid engine.
link |
That's the core of the colloid engine.
link |
It's the way I've been talking about it.
link |
It's more of ion electrospray.
link |
Colloid tends to mean like liquid droplets
link |
coming off of the jet.
link |
But if you make smaller and smaller cones,
link |
you get pure ions.
link |
So we're kind of like a subset of colloid, yes.
link |
What aspects of this?
link |
You said that it's been full of mystery
link |
from the physics perspective.
link |
What aspects of this are understood
link |
and what are still full of mystery?
link |
Yeah, recently we've been understanding
link |
the kind of instabilities and stable regimes of,
link |
you know, how much liquid do you supply
link |
and what field do you apply?
link |
And why is it flickering on and off
link |
or why does it have these weird behaviors?
link |
So that's in the past just couple of years
link |
that's become much more understood.
link |
I think the two areas that come to mind
link |
as far as not as well understood are the boundary between,
link |
you know, you have, we actually use
link |
kind of big molecular ions.
link |
And if you're looking at the molecular scale,
link |
you have, you know, some ions that you've extracted
link |
and they're in this electric field.
link |
One ion, you know, it's a big molecule.
link |
It's getting energy from the electric field
link |
and some of that energy is going into the bonds
link |
and making it vibrate and doing weird things to it.
link |
Sometimes it breaks them apart.
link |
And then zooming out to the whole beam,
link |
the beam has some behaviors as this beam of ions.
link |
And there's a big gap between what are those,
link |
how do you connect those
link |
and how do we understand that better
link |
so that we can understand the beam performance of the engine?
link |
Is that a theory question or is it an engineering question?
link |
Theory, definitely.
link |
We're, Axion is a startup and we're more in the business
link |
of building and testing and observing and characterizing.
link |
And we're not really diving much into that theory right now.
link |
Okay, zooming out a little bit on the physics,
link |
I apologize for the way too big of a question,
link |
but to you from either, you mentioned Axion is,
link |
you know, more of sort of an engineering endeavor, right?
link |
From a perspective of physics in general,
link |
science in general, or the side of engineering,
link |
what do you think is the most to you like beautiful
link |
and captivating and inspiring idea in this space?
link |
In this space, and then I'm gonna zoom out
link |
a little bit more, but in this space,
link |
I keep budding up against material science questions.
link |
So I, over the past 10 years,
link |
I feel like every problem or interesting thing
link |
I want to work on, if you dig deep enough,
link |
you end up in material science land,
link |
which I find kind of exciting
link |
and it makes me want to dig in more there.
link |
And I was just, you know, even for our technology,
link |
when we have to move the propellant from the tank
link |
to the tip of the emitters,
link |
we rely a lot on capillary action
link |
and you're getting into wetting and surface energies.
link |
At a scale of like, you know.
link |
Yeah, I mean, it's, if you look further, it's quantum too,
link |
but it all is, you know.
link |
Like, capillary action at the quantum level.
link |
Yeah, so I would, it all comes back to me,
link |
to, you know, material science.
link |
There's so much we don't understand at these sizes.
link |
And I find that inspiring and exciting.
link |
And then more broadly, you know,
link |
I remember when I learned that the same equation
link |
that describes flow over an airfoil
link |
is used to price options, the Black Scholes equation.
link |
And it's, you know, just a partial differential equation,
link |
but that kind of connectedness of the universe,
link |
you know, I don't want to use options pricing
link |
and the universe and the same.
link |
But you know what I mean, this connectedness,
link |
I find really magical.
link |
Yeah, the patterns that mathematics reveals
link |
seems to echo in a bunch of different places.
link |
Yeah, there's just weirdness.
link |
It's like, it really makes you think,
link |
I think through definitely living in a simulation,
link |
like whoever programmed it.
link |
I like that, that's your conclusion.
link |
It's using like shortcuts to program it.
link |
Like they didn't, they're just copying pieces
link |
and codes for the different parts.
link |
Yeah, think of something new or just paste from over there.
link |
They won't notice.
link |
My conclusion from that was,
link |
I'm going to go interview for finance jobs.
link |
So I had like a little detour.
link |
That's the backup option.
link |
So in terms of using Colet engines,
link |
what's an interesting difference
link |
between a propulsion of a rocket from Earth,
link |
when you're standing on the ground to orbit,
link |
and then the kind of propulsion necessary
link |
for once you get out to orbit
link |
or to like deep space to move around?
link |
Yes, the reason you can't use an engine like mine
link |
to get off the ground is,
link |
you know, the thrust it generates
link |
is instantaneous thrust is very small.
link |
But if you have the time
link |
and can accumulate that acceleration,
link |
you can still reach speeds
link |
that are very interesting for exploration
link |
and even for missions with humans on them.
link |
An interesting direction,
link |
I think we need to go as humans,
link |
exploring space is the power supplies
link |
for electric propulsion are limiting us
link |
in that, you know, solar panels are really inefficient
link |
and bulky and batteries.
link |
I don't know when anybody's ever going to improve
link |
battery technology.
link |
I know a lot of people that work on that.
link |
And nuclear power,
link |
we could have a lot more powerful electric propulsion system.
link |
So they would be extremely fuel efficient,
link |
but more instantaneous thrust
link |
to do more interesting missions
link |
if we could start launching more nuclear systems.
link |
So like something that's powered,
link |
nuclear powered, that's the right way to say it.
link |
But isn't a small enough container that could be launched?
link |
Yeah, so, I mean, as a world,
link |
we do launch spacecraft with nuclear power systems on board,
link |
but size is one consideration.
link |
It hasn't been a big focus.
link |
So the reactors and the heaters and everything are bulky.
link |
And so they're really only suitable
link |
for some of the much bigger interplanetary stuff.
link |
So that's one issue, but then it's a whole like
link |
rat's nest of political stuff as well.
link |
I heard, I think Elon described or somebody,
link |
I think it was Elon that described the EV
link |
to all electrical vertical takeoff and landing vehicles.
link |
So basically saying rockets,
link |
obviously Elon is interested in electric vehicles, right?
link |
But he said that rockets can't.
link |
In the near term, it doesn't make sense
link |
for them to be electrical.
link |
What do you see a world with the rockets
link |
that we use to get into orbit are also electric based?
link |
It's possible, you can produce the thrust levels you need,
link |
but you need this, a much bigger power supply.
link |
And I think that would be nuclear.
link |
And the only way people have been able to launch them
link |
at all is that they're in a, you know,
link |
100 times redundancy safe mode while they're being launched
link |
and they're not turned on until they're farther off.
link |
So if you were to actually try to use it on launch,
link |
I think a lot of people would still have an issue with that,
link |
It's an interesting concept, nuclear.
link |
It seems like people, like everybody that works
link |
on nuclear power has shown how safe it is
link |
as a source of energy.
link |
And yet we seem to be, I mean, based on the history,
link |
based on the excellent HBO series,
link |
I'm Russian with a Chernobyl.
link |
It seems like we have our risk estimation
link |
about this particular power source is drastically inaccurate,
link |
but that's a fascinating idea
link |
that we would use nuclear as a source for our vehicles
link |
and not just in outer space.
link |
I'm gonna have to look into that.
link |
That's super interesting.
link |
Well, just last year,
link |
Trump eased up a little bit on the regulations
link |
and NASA and hopefully others are starting
link |
to pick up on the development.
link |
So now is a good time to look into it
link |
because there's actually some movement.
link |
Is that a hope for you to explore different energy sources
link |
that the entirety of the vehicle uses something like,
link |
like the entirety of the propulsion systems
link |
for all aspects of the vehicle's life travel
link |
is the same or electric?
link |
Is it possible for it to be the same?
link |
Like the coolant engine being used for everything.
link |
You could, and you would have to do it in the same way.
link |
We do different stages of rockets now
link |
where once you've used up an engine or a stage,
link |
you let it go because there's really no point
link |
in holding onto it.
link |
So I wouldn't necessarily want to use
link |
the same engine for the whole thing,
link |
but the same technology I think would be interesting.
link |
Okay, so it's possible.
link |
All right, but in terms of the power source.
link |
The power source, that's really interesting.
link |
But for the current power sources
link |
and its current use cases,
link |
what's the use case for electric?
link |
Like the coolant engine,
link |
can you talk about where they're used today?
link |
Sure, so chemical engines are still used quite a bit
link |
once you're in orbit,
link |
but that's also where you might choose instead
link |
to use an electric system
link |
and what people do with them.
link |
And this includes the ion engines
link |
and hall thrusters and our engine
link |
is basically any maneuvering you need to do
link |
once you're dropped off.
link |
Even if your only goal was to just stay in your orbit
link |
and not move for the life of your mission,
link |
you need propulsion to accomplish that
link |
because the Earth's gravity field changes
link |
as you go around in orbit
link |
and pulls you out of your little box.
link |
There are other perturbations
link |
that can throw you off a bit.
link |
And then most people want to do things
link |
a little bit more interesting,
link |
like maneuver to avoid being hit by space debris
link |
or perhaps lower their orbit
link |
to take a higher resolution image of something
link |
At the end of your mission,
link |
you're supposed to responsibly get rid of your satellite,
link |
whether that's burning it up,
link |
but if you're in geo,
link |
you want to push it higher into graveyard orbit.
link |
So low Earth orbit and then geo synchronous orbit
link |
or geo stationary orbit.
link |
And there's a graveyard.
link |
Yeah, so those satellites are at like 40,000 kilometers.
link |
So if they were to try to push their satellites
link |
back down to burn up in the atmosphere,
link |
they would need even more propulsion
link |
than they've had for the whole lifetime of their mission.
link |
So instead they push them higher
link |
where it'll take a million years
link |
for it to naturally deorbit.
link |
So we're also cluttering that higher bit up as well,
link |
but it's not as pressing as Leo,
link |
which is low Earth orbit,
link |
where more of these commercial missions are going now.
link |
Well, so how hard is the collision avoidance problem there?
link |
You said some debris and stuff.
link |
So like how much propulsion is needed?
link |
Like how much is the life of a satellite
link |
is just like a crap trying to avoid like
link |
what if it's in there?
link |
I think one of the recent rules of thumb I heard was per year
link |
some of these small satellites
link |
are doing like three collision avoidance maneuvers.
link |
So that's not, yeah,
link |
but it's not zero and it takes a lot of planning
link |
and people on the ground and none of that really,
link |
I don't think right now is autonomous.
link |
Oh, that's not good.
link |
Yeah, and then we have a lot of folks
link |
taking advantage of Moore's law and cheaper spacecraft.
link |
So they're launching them up
link |
without the ability to maneuver themselves.
link |
And they're like, well, I don't know, just don't hit me.
link |
And three times a year that could become affordable
link |
if it's like, if it gets hit, maybe it won't be damaged
link |
kind of thing, that kind of logic.
link |
Affordable in that instead of launching one satellite,
link |
they'll launch, you know, 20 small ones.
link |
Yeah, so if one gets taken out, that's okay.
link |
But the problem is that, you know,
link |
one good size satellite getting hit,
link |
that's like a ballistic event
link |
that turns into 10,000 pieces of debris
link |
that then are the things that go and hit the other satellites.
link |
Do you see a world where like in your sense,
link |
in your own work and just in the space industry in general,
link |
do you see that people are moving towards bigger satellites
link |
or smaller satellites?
link |
Is there going to be a mix?
link |
Like what's, and what do we talk,
link |
what does it mean for a satellite to be big and small?
link |
What size are we talking about?
link |
So big, the space industry prior to, I don't know, 1990,
link |
you know, I guess the bulk of the majority of satellites
link |
were the size of a school bus
link |
and costs a couple billion dollars.
link |
And now, you know, our first launches were on satellites
link |
the size of shoeboxes that were built by high school students.
link |
So that's a very different, you know,
link |
to give you the two ends of the spectrum.
link |
Big satellites will, I think they're here to stay,
link |
at least as far as I can see into the future
link |
for things like broadcasting.
link |
You want to be able to, you know,
link |
broadcast to as many people as possible.
link |
You also can't just go to small satellites
link |
and say Moore's law for things like optics.
link |
So if you have an aperture on your satellite, you know,
link |
that just, that doesn't follow Moore's law, that's different.
link |
So it's always going to be the size that it will be,
link |
you know, unless there's some new physics
link |
that comes out that I'm not aware of.
link |
But if you need a resolution and you're at an altitude
link |
that kind of sets your size of your telescope.
link |
But because of Moore's law,
link |
we are able to do a lot more with smaller packages
link |
and with that, you know, comes more affordability
link |
and opening up access to space to more and more people.
link |
Well, what's the smallest satellite you've seen go up there?
link |
Like, what are the smallest kind, you said shoeboxes.
link |
Yeah, so I think, you know, the smallest,
link |
the smallest common form factor can fit a softball inside.
link |
So that's 10 centimeters on each side.
link |
But then there are some companies working on, you know,
link |
fractions of that even.
link |
And they're doing things like IOT type application.
link |
So it's very low, you know, bandwidth type things,
link |
but they're finding some niches for those.
link |
Do you mean like there's a business,
link |
there's a thing to do with them?
link |
Yes, either. What do you do with a small satellite like that?
link |
You can, you know, track a ship going across the ocean
link |
is like, if you need to, if you just pinging something,
link |
you know, you can handle that amount of data
link |
and those latencies and so on.
link |
You have to have propulsion on that.
link |
You have to have a little engine.
link |
No, those are just, you know, letting fall out of the sky.
link |
But what, so what kind of solid lights
link |
would you equip a colloid engine on?
link |
Anything that's bigger than probably about 20 kilograms,
link |
anything that needs to stay up for more than a year
link |
or anything somebody spent more than like a hundred K
link |
to build are kind of the ways I would think about it.
link |
That's a lot of use cases.
link |
What's the small set?
link |
Like what's category?
link |
Small set is actually very big.
link |
I think it's like 700 kilograms or,
link |
keep hitting my microphone.
link |
Maybe a thousand kilograms down to 200 kilograms
link |
or people have their own kind of definitions
link |
of how they break them up,
link |
but small set is still quite large.
link |
And then it's kind of also applied as a blanket term
link |
for anything that's not a school bus size satellite.
link |
We need to get our jargon straight industry.
link |
So what, do you see a possible future where, you know,
link |
there's a few thousand satellites up there now,
link |
a couple of thousand of them functioning?
link |
Do you see a future where there's like millions of satellites
link |
up in orbit or forget millions, tens of thousands?
link |
Which just seems like where the natural trajectory
link |
of the way things are going now is going.
link |
Tens of thousands, yes.
link |
The two, you know, buckets of applications.
link |
One is imaging and the other is communication.
link |
So imaging, I think that will plateau
link |
because one satellite or one constellation
link |
can take an image or a video and sell it
link |
to, you know, infinity customers.
link |
But if you're providing communications
link |
like broadband internet or satellite cell
link |
or something like that, satellite phone, you know,
link |
you're limited by your transponders and so on.
link |
So to serve more people, you actually need more satellites
link |
and perhaps at the rate, you know, our data consumption
link |
and things are going these days.
link |
Yeah, I can see tens of thousands of satellites.
link |
Can I ask you a ridiculous question?
link |
So I've recently watched this documentary on Netflix
link |
about flat earthers that, you know,
link |
the people that believe in a flat earth.
link |
As somebody who develops propulsion systems
link |
for satellites and for spacecraft,
link |
what's to use the most convincing evidence
link |
that the earth is round?
link |
Probably some of the photos taken from the moon.
link |
Photos in the moon, okay.
link |
So it's not from the satellite space.
link |
Yeah, I think seeing that perspective,
link |
maybe I'm just, I'm answering too personally
link |
because I really love those photos.
link |
Because they're beautiful, yeah.
link |
I really like the ones that show the moon
link |
and the lunar lander and they're taken
link |
a little bit farther back.
link |
So you see earth and first you're like, wow, that's tiny
link |
and we're insignificant and that's kind of sad.
link |
But then you see this really cool thing
link |
that we landed on another, you know, planetary body
link |
and you're like, oh, okay.
link |
Can you actually see her?
link |
I don't know if I remember this one.
link |
Yeah, I'll send you that picture.
link |
Because I love the pictures or videos of just earth
link |
from more from orbit and so on.
link |
That's really beautiful.
link |
That's like a perspective shifter.
link |
That's the pale blue dot, right?
link |
It probably appears tiny.
link |
Yeah, and just that, you know,
link |
juxtaposition of the insignificance, but.
link |
That's really cool thing, I just love that.
link |
I personally love the idea of humans stepping out of Mars.
link |
I'm such a sucker for the romantic notion of that
link |
and being able to take pictures from Mars.
link |
I would be, what did you say you said you wouldn't be?
link |
Not in the first thousand.
link |
The thousand, which it's funny because to me
link |
that's brave to be in the first million.
link |
I think when the Declaration of Independence
link |
was signed in the United States,
link |
that was like two million people.
link |
So I would like to show up
link |
when they're signing those documents.
link |
So maybe the two million.
link |
Oh, that's an interesting way to think of it.
link |
Cause like then we're like participating
link |
as citizenry and defining the direction.
link |
So it's not the technical risk.
link |
You just don't want to show up somewhere
link |
that's like America before.
link |
Yeah, because I, from a psychological perspective,
link |
it's just going to be a stressful mess
link |
as people have studied, right?
link |
It's like it's people, most likely the process
link |
of colonization like looks like basically a prison.
link |
Like you're in a very tight enclosed space with people.
link |
And it's just a really stressful environment.
link |
You know, how do you select the kind of people
link |
that will go and then there'll be drama.
link |
There's always drama in this.
link |
And I just want to show up when there's some rules.
link |
But I mean, you know, it depends.
link |
So I'm not worried about the health
link |
and the technical difficulties.
link |
I'm more worried about the psychological difficulties.
link |
And also just not being able to tweet.
link |
Like what are you going to, how are you,
link |
there's no Netflix.
link |
So yeah, maybe not in the first million,
link |
but the first hundred thousand.
link |
It's exciting to define the direction of a new,
link |
like how often do we not just have a revolution
link |
to redefine our government?
link |
As you know, smaller countries are still doing to this day,
link |
but literally start over from scratch.
link |
There's just our financial system.
link |
It could be like based on cryptocurrency,
link |
you could think about like how democracy, you know,
link |
we have now the technology that can enable pure democracy.
link |
For example, if we choose to do that,
link |
as opposed to representative democracy,
link |
all those kinds of things.
link |
So we talked about two different forms of propulsion,
link |
which are super exciting.
link |
So the chemical base, that's doing pretty well.
link |
And then the electric base is,
link |
are there types of propulsion
link |
that might sound like science fiction right now,
link |
but are actually within the reach of science
link |
in the next 10, 20, 30, 50 years
link |
that you kind of think about,
link |
or maybe even within the space of even just like,
link |
like even ion engines,
link |
is there like breakthroughs that might 10x the thing,
link |
like really improve it?
link |
So, you know, the real game changer
link |
would be propellant less propulsion.
link |
And so every couple of years you see a new,
link |
now a startup or a researcher
link |
comes up with some contraption for producing thrust
link |
that didn't require, you know,
link |
we've been talking about conservation of momentum,
link |
mass times velocity out the back,
link |
mass times velocity forward, yes, exactly.
link |
And you have to, you know, carry that up with you
link |
or find it on an asteroid or harvest it from somewhere
link |
if you didn't bring it with you.
link |
So not having to do that would be, you know,
link |
one of the ultimate game changers.
link |
And I, you know, unless there are new types of physics,
link |
I don't know how we do it, but it comes up often.
link |
So it's something I do think about.
link |
And, you know, the one, I think it's called the Kazmir effect.
link |
If you can, if you have two plates
link |
and the space between them is on the order of these,
link |
like the wavelength of these ephemeral vacuum particles
link |
that pop into and out of existence or something.
link |
I may be confusing multiple types of propellant less forces,
link |
propellant less forces, but that could be real
link |
and could be something that we use eventually.
link |
We'll be the power source.
link |
Yeah, the most recent engine like this
link |
that has was just debunked this year,
link |
I think in March or something was called the M drive.
link |
And supposedly you used a power source.
link |
So, you know, batteries or solar panels
link |
to generate microwaves into this resonant cavity.
link |
And people claimed it produced thrust.
link |
So they went straight from this really loose concept
link |
to building a device and testing it.
link |
And they said, we've measured thrust
link |
and sure on their thrust balance, they saw thrust
link |
and different researchers built it and tested it
link |
and got the same measurements.
link |
And so it was looking actually pretty good.
link |
No one could explain how it worked,
link |
but what they said was that this inside the cavity,
link |
the microwaves themselves didn't change,
link |
but the speed of light changed inside the cavity.
link |
So relative to that, you know, their momentum was conserved.
link |
And I don't, you know, whatever.
link |
But finally, someone I think at NASA built the device,
link |
tested it, got the same thrust, then unhooked it,
link |
flipped it backwards and turned it on,
link |
but got the same thrust in the same direction again.
link |
And so they're like, this is just an interaction
link |
with the test set up or, you know,
link |
some of the chamber or something like that.
link |
So forwarded again, but, you know,
link |
it would be so wonderful for everybody
link |
if we could figure out how to do it.
link |
That's an interesting twist on it
link |
because that's more about efficient travel,
link |
long distance travel, right?
link |
That's not necessarily about speed.
link |
That's more about enabling like less.
link |
Hook that up to the nuclear power supply.
link |
But still in terms of speed, in terms of trying to,
link |
so there's recently, already I think been debunked
link |
or close to being debunked, but the signal,
link |
a weird signal from our nearby friends,
link |
nearby exoplanets from Proxima Centauri,
link |
a signal that's 4.2 light years away.
link |
So, you know, the thought is it'd be kind of cool
link |
if there's life out there, alien life,
link |
but it'd be really cool if it could fly out there and check.
link |
And so what kind of propulsion,
link |
and do you think about what kind of propulsion
link |
allows to travel close to the speed of light
link |
or, you know, half the speed of light,
link |
all those kinds of things that would allow us
link |
to get to Proxima Centauri
link |
and that reasonable in a lifetime?
link |
You know, there's the project Breakthrough Starshot
link |
that's looking at sending those tiny little chipsets there.
link |
And like accelerating really fast.
link |
Yeah, using a laser.
link |
So launching them, and then while they're still
link |
relatively close to the earth, you know,
link |
blasting them with some, I forget what,
link |
even what power level you needed to accelerate them fast enough
link |
to get there in 20 years.
link |
Super crazy sounding, but a lot of people say
link |
that's a legitimate, like it's crazy sounding,
link |
but it can actually pull it off.
link |
Yeah, I love that project
link |
because there are a lot of different aspects.
link |
You know, there's the laser,
link |
there's how do you then get enough power
link |
when you're there to send a signal back.
link |
No part of that project is possible right now,
link |
but I think it's really exciting.
link |
But do you see like human,
link |
like a spacecraft with a human on it,
link |
so there's like a heavy one,
link |
like us inventing new propulsion systems entirely.
link |
Like do you ever see that on the radar
link |
of propulsion systems like that,
link |
or are they completely out there in the impossible?
link |
Well, we're going to quickly leave the realm
link |
of what I can describe with any credibility,
link |
but I think because of special relativity,
link |
if we try to accelerate some mass
link |
so close to the speed of light,
link |
it becomes infinitely heavy
link |
and then we just don't,
link |
we'd have to like harness a lot of suns to do that.
link |
Or, you know, it's just that math doesn't quite work out,
link |
but, you know, in my child's,
link |
my child like heart,
link |
I believe that, you know, we're missing something,
link |
whether it's, you know, dark matter or other dimensions.
link |
And if you can just have some anti matter
link |
and a black hole and then ride that around
link |
and somehow, you know, turn that into some.
link |
Mess with gravity somehow.
link |
Yeah, I feel like we're missing lots of things
link |
in this puzzle and that, you know.
link |
I wonder how that puzzle, yeah, right.
link |
Well, I can speak with confidence
link |
as a descendant of Apes
link |
that we don't know what the hell we're doing.
link |
So there's, we're like really confident,
link |
like physicists are really confident
link |
that we've like got most of the picture down.
link |
But it feels like, oh boy,
link |
it feels like that we might not even be getting started
link |
on some of the essential things
link |
that would allow us to engineer systems
link |
that would allow us to travel to space much, much faster.
link |
Yeah, and there's even things that are much more common place
link |
that we can't explain,
link |
but we've started to take for granted,
link |
like quantum tunneling, you know.
link |
Just things like, oh, the electron was here
link |
with this energy and now it's here with this energy
link |
and it's just tunneling.
link |
But so, you know, we're missing a lot of the picture.
link |
So yeah, I don't know to, you know,
link |
use your same question from earlier.
link |
I don't know if you and I will see it,
link |
but yeah, someday.
link |
You're the cofounder of just like we've been talking
link |
about axion systems, it's a,
link |
would you say space propulsion company?
link |
So how do you, big question,
link |
how do you build a rocket company
link |
from like a propulsion company
link |
from one person from two people to 10 people plus?
link |
Plus, and actually, you know,
link |
take it to a successful product.
link |
Yeah, well, I think the early stage is quite,
link |
I'm not supposed to use the word easy
link |
when you work in rocket science, but straightforward.
link |
When you're working on something, you know, sexy,
link |
like an ion engine, it's more straightforward
link |
to raise money and get people to come work for you
link |
because the vision's really exciting.
link |
And actually that's something I would say
link |
is very important throughout is a really exciting vision
link |
because when everything, you know, goes to crap,
link |
you need that to get people getting themselves out of bed
link |
in the morning and thinking of the higher purpose there.
link |
And, you know, another thing along the way
link |
that I think is key in building any company
link |
is the right early employees
link |
that also have their own networks
link |
and can bring in a lot of people that,
link |
you know, really make the whole greater
link |
than just the sum of the early team.
link |
And how do you build that?
link |
Like, how do you find people?
link |
It's like asking like, how do you make friends?
link |
But is there, is it luck?
link |
Is there a system?
link |
Like how in terms of the people you've connected
link |
with the people you've built a company with,
link |
is there some thread, some commonality, some pattern
link |
that you find to be, to hold for what makes a great team?
link |
I think, you know, personally a thread for me
link |
has been my network and being able to draw on that a lot
link |
but also giving back to it as much as possible
link |
in like an unsolicited sort of way,
link |
like making connections between people that,
link |
you know, maybe didn't ask,
link |
but that I think could be really fruitful.
link |
And even, you know, weirder than that is just really
link |
getting, you know, having weird, uncomfortable conversations
link |
with people like at a conference
link |
and getting over the small talk quickly
link |
and getting to know them quickly
link |
and having a relationship that stands out
link |
and then being able to call on them later because of that.
link |
And I think that's been because I'm introverted
link |
and I, you know, want to poke my eyes out
link |
instead of go and do small talk.
link |
And so I huddle in a corner with one person
link |
and, you know, we talk about aliens or things like that.
link |
And so, you know, that's all to say that,
link |
you know, having a strong network
link |
I think is really important, but a genuine one.
link |
And let's see, other ways to build a rocket company,
link |
kind of making sure you're paying attention
link |
to the sweeping trends of the industry.
link |
So everybody just cares about cost
link |
and being able to get out ahead of that
link |
and even more than we ever thought we'd need to
link |
as far as what we needed to price our systems at,
link |
you know, people for since the start
link |
of the US space industry,
link |
they've been paying 20, 25 million in adjusted dollars
link |
for an ion engine and seeing that now people are going
link |
to want to pay 10K for an ion engine
link |
and just staying out ahead of that and those kinds of things.
link |
So, you know, being out in the industry
link |
and talking to as many people as possible.
link |
That's crazy. So there's a drive.
link |
I mean, I suppose SpaceX really pushed that.
link |
It's frustrating for me.
link |
So SpaceX really pushed this,
link |
the application of, I guess, capitalism
link |
of driving the price down of basically forcing people
link |
to ask the question, can this be done cheaper?
link |
This can lead to big problems, I would say,
link |
in the following sense.
link |
I see this in the car industry, for example,
link |
that people have, it's such a small margin for profit,
link |
like they've driven the cost of everything down so much
link |
that there's literally no room for innovation
link |
So like cars, which is funny because not until Tesla really,
link |
which is one of the, in a long, long time,
link |
one of the first successful new car companies
link |
that's constantly innovating,
link |
every other car company is really pouring
link |
in terms of their technological innovation.
link |
They innovate on design and style and so on,
link |
that people fall in love with the look and so on,
link |
but it's not really innovation.
link |
In terms of the technology,
link |
it's really boringly the same thing
link |
and they're really afraid of taking risks.
link |
And that's a big problem for Rocket Space, too,
link |
because if you're cutting out costs,
link |
you can't afford to innovate to try out new things
link |
and that's definitely true with Ion Engine, right?
link |
So how do you compete in this space?
link |
Do you, by the way, see SpaceX as a competitor?
link |
And what do you say in general about the competition
link |
Is it really difficult as a business to compete here?
link |
No, I don't see SpaceX as a competitor
link |
and I see them as one day not too long from now
link |
a customer, hopefully.
link |
I mean, to compete against that,
link |
I think you just have to do things in an unconventional way.
link |
So bringing silicon MEMS manufacturing to propulsion,
link |
you know, NASA doesn't make Ion Engines
link |
using a batch mass producible technique.
link |
They have one guy that's been making their Ion Engines
link |
for 20 years bespoke pieces of jewelry.
link |
So bringing things to what you're trying to innovate
link |
to make them, in our case, more cost effective
link |
I like the idea of somebody putting out Ion Engines
link |
Yeah, my advisor at MIT would, you know,
link |
the thruster chip I was holding up,
link |
he would wear one as a lapel pin.
link |
But in general, just on the topic of SpaceX,
link |
you know, 2020 has seen some difficult things
link |
for human civilization.
link |
And it's been a lot of, first of all, it's an election year.
link |
There's been a lot of drama and division about that.
link |
There's been riots of a little different reasons,
link |
There's been obviously a virus that's testing
link |
the very fabric of our society.
link |
But there's been really, for me,
link |
these super positive things, which inspiring things,
link |
which is SpaceX and NASA doing the first commercial human flight,
link |
launching humans to space and did it twice successfully.
link |
Did you get to watch that launch?
link |
Did you, what does it make you feel?
link |
Do you think this is first days for a new era of space exploration?
link |
Yeah, I did watch it.
link |
We played it outside on a big screen at our place.
link |
And I was a little, you know, they kept saying,
link |
Bob and Doug, Bob and Doug.
link |
And, you know, astronauts usually are treated
link |
with a little bit more fanfare.
link |
So it felt very casual, but maybe that was a good thing.
link |
Like this is the era of commercial crewed missions.
link |
It was a little bit more, what is it?
link |
Like playing guitar.
link |
It's more, it's a different flavor to it.
link |
More like fun, playful, celebrity type.
link |
Astronaut versus the aura of the magical,
link |
sort of heroic element of the single human representing us in space.
link |
I think that's all for the better though.
link |
It's so cool that it's such a common place thing now that we send,
link |
you know, I can't believe that sometimes I'll have to,
link |
you know, you don't even realize that astronauts are coming
link |
and going all the time, you know, splashing back down.
link |
And it's just so common now, but that's quite magical, I think.
link |
So yes, we did watch that.
link |
I love, love, love that we finally have that capability,
link |
again, to send people to the space station.
link |
And it's just really exciting to see the private sector stepping up
link |
to fill in where the government has pulled back in the US.
link |
And I think pulled back way too soon as far as exploration
link |
and science goes, probably pulled back at the right time
link |
for commercial things and getting that started.
link |
But I'm really happy that it's even possible
link |
to do that with private money and companies.
link |
Do you like the kind of the model of competition of NASA funding?
link |
I guess that's how it works is like they're providing quite a bit
link |
of money from the government and then private companies compete
link |
to be the delivery vehicles for whichever the government missions
link |
like NASA missions.
link |
Yes, I think for this type of mission is a little bit kind
link |
of straddles commercial and science.
link |
So I think it's good, but I do in general feel like we've pulled back
link |
too much on, you know, NASA's role in the science and exploration part.
link |
And I think our pace is too slow there, you know, for my liking, I suppose.
link |
Okay, so do you have, I mean, on the cost thing, do you feel like NASA
link |
was a little too bureaucratic in a sense, like too slow, too heavy,
link |
cost wise in their effort, like when they were running things purely
link |
without any commercial involvement?
link |
So I suppose it's more that I just want the government to fund.
link |
And maybe NASA's not the best organization to do it rapidly,
link |
but I think that, you know, again, depending on the goals,
link |
we're just kind of at the very starting point of space exploration
link |
and science and understanding.
link |
So we should be spending more money there and not less.
link |
And other countries are starting to spend more and more,
link |
and I think we'll fall behind because of that.
link |
So you have quite a bit of experience, first of all,
link |
starting a company yourself, but also I saw, maybe you can correct me,
link |
but you have quite a bit of knowledge of just the, in general,
link |
the startup experience of building companies that you've interacted with people.
link |
Is there advice that you can give to somebody, to a founder,
link |
cofounder who wants to launch and grow a new company
link |
and do something big and impactful in this world?
link |
I would say, you know, like I mentioned earlier,
link |
but make sure the vision is something that, you know,
link |
will get you out of bed in the morning and will get,
link |
and that you can rally other people around you to achieve.
link |
Because I see a lot of folks that sort of cared about something
link |
or saw a window of opportunity to do something
link |
and, you know, startups are hard and more often than not.
link |
Just being opportunistic isn't going to be enough
link |
to make it through all the really crappy things that are going to happen.
link |
So the vision just helps you psychologically to carry through the hardships,
link |
Yeah, you and the team, yeah, exactly.
link |
To kind of younger people interested in getting into entrepreneurship,
link |
I would say, you know, stay as close to like first principles
link |
and fundamentals as you can for as long as you can.
link |
Because really understanding the problems, you know,
link |
if it's something scientific or hardware related,
link |
or even if it's not, but having a deep understanding of the problem
link |
and the customers and what people care about
link |
and how to move something forward is more important
link |
than taking all of the entrepreneurship classes in undergrad.
link |
So being able to think deeply, yeah.
link |
Have you been surprised about how much like pivoting is involved?
link |
Like basically rethinking what you thought initially would be the right direction to go?
link |
Or is there if you think deeply enough that you can stick in the same direction for long enough?
link |
So our, you know, our guiding star hasn't changed at all.
link |
So that's been pretty consistent.
link |
But we, within that, we flip flop on so many things all the time.
link |
And, you know, to give you one example, it's do you stop and build a first product
link |
that's well suited to maybe a smaller, less exciting segment of the market?
link |
Or do you stay head down and focus on, you know, the big swing
link |
and trying to hit it out of the park right away?
link |
And we've flip flopped between that.
link |
And there's not a blanket answer and there are a lot of factors, but that's a hard one.
link |
And I think one other piece for the aspiring founder,
link |
spending a lot of time and effort on the culture and people piece is so important
link |
and is always an afterthought and something that I haven't really seen
link |
like the founders or executives that companies purposefully carve out time
link |
and acknowledge that, yes, this is going to take a lot of my time and resources.
link |
But you see them after the fact trying to repair the, you know, bro culture
link |
or whatever else is broken at the company.
link |
And I think that it's starting to change.
link |
But just to be aware of it from the beginning is important.
link |
I guess it should be part of the vision of what kind of place you want to create
link |
or what kind of, like, human beings.
link |
Like, you can't wait five, ten years and then just slap an HR person on to trying to fix it.
link |
Like, it has to be thoughtful from the beginning.
link |
Don't get me started on HR people.
link |
Don't leave HR to HR people, but I'll just leave it at that.
link |
You didn't say that.
link |
HR's actual HR is really important.
link |
This is so important.
link |
Yes, but so important.
link |
Culture is so important.
link |
And then I also was surprised, like, I thought you could say, here will be our culture and
link |
our values and that it was kind of distinct from who I and my co founder were as people.
link |
And I was like, no, that's not how that works.
link |
We just kind of like ooze out our behaviors and then the company grows around that.
link |
So you have to do a lot of, like, introspection and self work to not end up with a shitty
link |
It's kind of a, it's a, it's a relationship, but it's supposed to relationship with two
link |
It's a relationship with many people.
link |
And you, yeah, you communicate so much indirectly by who you are.
link |
You have to live it.
link |
As somebody, I think about this a lot cause generally I'm full of love and all those
link |
But like, I also get like really passionate.
link |
And when I see somebody in the context of work, especially when I see somebody who I
link |
know can do a much better job and they don't do a great job, I can lose my shit in a way
link |
that's like Steve Jobsian.
link |
And you have to think about exactly the right way to lose your shit.
link |
If you're going to, or if at all, you have to really think through that cause it sends
link |
You know, sometimes that's okay, like if you do it deliberately, like if you're going
link |
to do it deliberately, if you're going to say like, I'm going to be the kind of person
link |
that allows this and pays the cost of it, but you can't just think it's not going to
link |
This was like the first thing I worked on with my leadership coach was to how not to
link |
just snap people when they were being an idiot.
link |
And first I got really good at apologizing.
link |
That was the first step because it was going to take longer to fix the behavior.
link |
And then she, I've got, I'm actually a lot better at it now and it started with things.
link |
She's like, every time you walk through a doorway, think, you know, calm and take breaths
link |
before responding.
link |
And there were all sorts of these little things we did and it was mostly just changing the
link |
Oh boy, it's a long road.
link |
So people love it when we talk about books.
link |
Is there books, maybe three or so, technical fiction philosophical that had an impact on
link |
your life and you might recommend?
link |
And for each, is there an idea or so that you take away from it?
link |
So I've been a voracious reader all my life and I'm always reading like three or four
link |
or five books at a time.
link |
And now I use Audible a lot too and, you know, podcasts and things like that.
link |
So I think the first one that stands out to me is 10, it's a novel, Tender is the Night
link |
And I, I read it when I was much younger, but I went back and read it recently and it's
link |
not that good, so I'm not sure why it has like such an important place in my literary
link |
history, but I love Fitzgerald as an author because he's very, he has very like flowery
link |
prose that I can just picture what he's saying, but he does it in such a creative way.
link |
I remember that one in particular because it, you know, I read a ton as a kid too, but
link |
it kind of set me is like the beginning of my adult reading life and getting into classics
link |
and I kind of, I do feel like they seem intimidating maybe.
link |
And then I realized that they're all just like love stories.
link |
So yeah, isn't everything, you know, yeah, it's really, even, you know, I don't know,
link |
I was surprised that even like a lot of the Russian authors, you know, they're all just
link |
Which humans are pretty simple, there's not much to work with.
link |
So I think maybe that was it.
link |
It made like that whole world less intimidating to me and cemented my love for reading.
link |
People should have just approached the classics like, there's probably a love story in here.
link |
Somehow it boils down to a chick flick, so just relax and enjoy the ride.
link |
And then changing gears quite a bit.
link |
The beginning of Infinity, do you know it by David Deutsch?
link |
So he's a physicist at Cambridge or Oxford.
link |
And so I was introduced like more formally to a lot of the ideas, like a lot of the things
link |
we've talked about, he has a lot more like formalism and physics rigor around.
link |
And so I got introduced to, you know, more like jargon of how to think about some of
link |
these ideas, you know, like memes and, you know, DNA as, as ultimate meme, the concept
link |
of infinity and objective beauty, but he has a really strong grounding in physics.
link |
And then there's a rigorous way of talking about these like big topics.
link |
So that was very mind opening to me to read that.
link |
But it also, I think it's probably part of why I ended up marrying my husband is related
link |
And then I've had some other really great connections with people because I had read
link |
it and so had they turn that, that book, even that book into a love story.
link |
Your robot has a heart.
link |
And okay, the third series is, it's just, it's Harry Potter, of course, which somehow
link |
connects to, I haven't read Harry Potter.
link |
I forgive me, forgive me.
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But I've read Tolkien, but just Harry Potter, just haven't, haven't gotten to it.
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But your company name is somehow, I think, connected to Harry Potter, right?
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I think they heard this.
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I always feel like I have to justify my fandom.
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The first three books came out when I was 10.
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So I went along this journey with Harry, age wise, and I read them all like nine or
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10 times all seven books.
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And I think anything that just keeps you reading is, is what's important.
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And you know, there, I have lulls where I don't feel like reading anything.
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So I'll reread a Harry Potter or a, you know, trashy detective novel or something.
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And I don't really care.
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And that's why I mentioned Harry Potter, because it, you know, whatever just keeps
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me reading, I think is important.
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And it was a big part of my life growing up.
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And then yes, Axion, the official story of the naming of the company is that Axion is
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like a concatenation of accelerate and Ion, but it actually came from Accio, the summoning
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And then we just added an N and it was perfect.
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What's the summoning charm?
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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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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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It's your safe place you return to something like the Harry Potter that, you know, I reread
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Whatever keeps me reading, I think is, is the most important thing.
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So yeah, I'm actually the same way in terms of the habit of it.
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Yeah, it's important to just keep, keep reading.
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But I have found myself struggling a little bit to, because I listen to a lot of audiobooks
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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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But there, there's a huge value to just reading long form still.
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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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So you could think of it that way.
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That's kind of what, yeah.
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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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As you go to this other world and it's, it's nice because it's like much more efficient.
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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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It's like people say they love traveling and I say I love traveling too.
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I just, yeah, read fiction.
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I told my three year old that, that was why we read so much because we, you know, see
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the places in our mind and I'm like, it's basically like we're watching a movie.
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You know, that's how it feels.
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And she's like, I prefer watching frozen with popcorn.
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Was that your response that you're three?
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That's a good point.
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But yeah, there's some power to the imagination.
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That's not just like watching a movie because some, something about of our imagination
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because it's, it's the words in the world that's painted somehow mixing in with our
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own understanding of our own hopes and dreams, our fears, it like mixes up in there in the
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way we can build up that world from just the page.
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You're, you're really creating the world just with the like prompts from the book.
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That's different than watching a movie.
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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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Well, we kind of brought this up in terms of the, depending on what the goals are.
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Let me ask the big, your friends with Manolis, he's obsessed with this question.
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So let me ask the big ridiculous question about the meaning of life.
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Do you have, do you ever think about this one?
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Do you ever ponder the, the reason we're here, the sense of apes on this spinning ball in
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the middle of nowhere?
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I don't, I don't think one ends up in the field of space propulsion without thinking
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up these existential questions.
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Or builds a business.
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We've touched on a lot of the different pieces of this, I think.
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So I, I have a bunch of thoughts.
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I do think that, you know, the goal isn't, the meaning isn't anymore just to be like a
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petri dish of bacteria that reproduces and, you know, where survival and reproduction
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are the main objectives.
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And maybe it's because now we're able to answer these, ask those questions.
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That's maybe the turning point.
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And instead, I think it's really the, the pursuit and generation of knowledge.
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And so if, if we're taken out by an asteroid or something, I think that it will have been
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a, you know, meaningful endeavor if somehow our knowledge about the universe is preserved
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somehow and the next civilization isn't starting over again.
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So that, that's, that's, I always, yeah, I resonate with that.
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I always loved the mission of Google from the early days of making the world's sort
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of information and knowledge searchable.
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I always loved that idea.
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I was loved, I was donated as people should to Wikipedia.
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I just love Wikipedia.
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I feel like it's the, it, that's one of the greatest accomplishments of just a humanity
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of us together, especially Wikipedia and this opens like in this open community way, putting
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together different knowledge is like on everything we've talked about today, I'm sure there's
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a Wikipedia page about ion engines and I'm sure it's pretty good.
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Like it's, I don't know, that's, that's incredible.
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And obviously that can be preserved pretty efficiently, at least Wikipedia.
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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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this one USB drive slowly traveling out, Wikipedia on it.
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That's on from the beginning of our chat that one lonely spacecraft, it just needs Wikipedia
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and then it will have been a civilization well spent.
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So pushing that knowledge along through like one little discovery at a time is one of,
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is a core aspect of the meaning of it, of it all.
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And I also, I haven't yet figured out what the connection, you know, an explanation I'm
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happy with yet for how it's connected, but evolving beyond just the survival piece too,
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I think like we touched on the emotional aspect, something in there about cooperation and,
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And so I, in my day to day that just boils down to, you know, the pursuit of knowledge
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or improving the human condition and being kind.
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Love and knowledge.
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So I'm pretty at peace with that as the meaning right now makes sense to me.
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While you work on a spacecraft proposal.
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Like literal rocket science.
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Natalia, this is amazing conversation.
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You work on such an exciting engineering field.
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And I think this is like what 20th, 21st century will be remembered for is space exploration.
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So this is exciting space that you're working on.
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And thank you so much for spending your time with me today.
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Thanks for having me.
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Thanks for listening to this conversation with Natalia Bailey.
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And thank you to our sponsors, MonkPak Low Carb Snacks, Four Sigmatic Marshmallow Coffee,
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Blinkist, an app that summarizes books, and Sunbasket, meal delivery service.
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So the choice is snacks, caffeine, knowledge, or a delicious meal.
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Choose wisely my friends.
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And if you wish, click the sponsor links below to get a discount at the support this podcast.
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And now let me leave you with some words from Carl Sagan.
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All civilizations become either space faring or extinct.
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Thank you for listening and hope to see you next time.