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Lightcone · 4 min · Jun 19, 2025

SpaceX began as a way to make Mars affordable

Elon Musk found no NASA plan to send people to Mars and concluded rockets were too costly. That realization led him to start SpaceX to lower the cost of spaceflight.

Elon Musk

Elon Musk is a technology entrepreneur.

  • Garry Tan, Host · President & CEO, Y Combinator

    Co-founded Posterous and Initialized Capital, an early Coinbase backer.

  • Harj Taggar, Host · Managing partner, Y Combinator

    Co-founded Auctomatic with the Collison brothers and later Triplebyte.

  • Diana Hu, Host · Managing partner, Y Combinator

    CTO of Escher Reality; after Niantic bought it, ran AR for Pokémon GO.

  • Jared Friedman, Host · Managing partner, Y Combinator

    Co-founded Scribd, which YC funded in 2006; has advised 20+ YC unicorns.

About this segment

Elon Musk found no NASA plan to send people to Mars and concluded rockets were too costly. That realization led him to start SpaceX to lower the cost of spaceflight.

From “Elon Musk: Digital Superintelligence, Multiplanetary Life, How to Be Useful”, Jun 19, 2025. Watch the full episode

“the problem was not that there was insufficient will to go to Mars, but there was no way to do so without breaking the budget”
Elon Muskat 16:11 · Lightcone16:11

Takeaways

  1. Musk first explored a small Mars mission to inspire public interest.
  2. Russian missile prices made buying rockets an impractical route.
  3. He started SpaceX to advance rocket technology for Mars.

In this episode

Full episode
  1. 25:44First-principles reasoning can expose hidden cost reductions6:20
  2. 17:01SpaceX and Tesla nearly ran out of money in 20085:11
  3. 43:08Neuralink could raise human communication bandwidth3:15
  4. 13:10SpaceX began as a way to make Mars affordable3:46

  5. 22:14Musk measures ambition by useful work, not status3:07Up next
  6. 31:56Human-generated data is running short, so AI needs synthetic data2:34
  7. 36:32Musk says Mars could become self-sustaining within 30 years3:13
  8. 11:05Zip2’s customer constraints pushed Musk toward direct-to-consumer2:28

Transcript

Transcribed by machine (Whisper) from the episode’s audio, so a word may be off here and there.

  1. 13:23

    Well, I was kind of curious as to why we had not sent anyone to Mars. And I went on the NASA website to find out when we're sending people to Mars, and there was no date. I thought maybe it was just hard to find on the website. But in fact, there was no real plan to send people to Mars. So then, you know, this is such a long story, so I don't want to take up too much time here. I think we're all listening with rapt attention.

  2. 13:50

    so i was actually i was on the long island expressway with my friend adair resi we're like housemates in college and and they was asking me what i'm what we're gonna do what am i gonna do after paypal and i was like it's like i don't know i guess maybe i'd like to do something philanthropic in space because i didn't think i could actually do anything commercial in space because that seemed like the purview of nations um so um but you know i'm kind of curious as to we're going to send people to mars and and that's when i was like oh it's on the website and i started digging on not there's nothing on the nasa website so then i started digging in and um and uh and i'm i'm definitely summarizing a lot here but um i i i uh my first idea was to do a philanthropic mission to mars called life to mars where it would send a a small greenhouse with season dehydrated

  3. 14:44

    nutrient gel land land that on mars and grow you know hydrate the gel and then you'd have this this great sort of money shot of green plants on a red background um for the longest time i by the way i didn't realize money shot i think is a porn reference but uh but anyway the point is that that would be the great shot of green plants on a red background and to try to inspire uh you know nasa and the public to to send astronauts to to mars As I learned more, I came to realize, and along the way, by the way, I went to Russia in like 2001 and 2002 to buy ICBMs, which is like, that's an adventure.

  4. 15:26

    You know, you go and meet with Russian high command and say, I'd like to buy some ICBMs. This was to get to space as a rocket. Not to nuke anyone, but they had to, as a result of arms reduction talks, they had to actually destroy a bunch of their big nuclear missiles. So I was like, well, how about if we take two of those, you know, minus the nuke, add an additional upper stage for Mars? But it was kind of trippy, you know, being in Moscow.

  5. 16:00

    what of 2001 negotiating with like the Russian military to buy ICVMs like that's crazy um and but they kept also like raising the price on me so that so like literally it's kind of like the opposite of what a negotiation should should do so I was like man these things are getting really expensive and and then I came to realize that actually the problem was not that there was insufficient will to go to Mars, but there was no way to do so without breaking the budget, even breaking the NASA budget. So that's where I decided to start SpaceX to advance rocket technology to the point where we could send people to Mars. And that was in 2002.