Principal @StarbenchA

San Francisco
Joined November 2008
The Earth's and Moon's geoid heights, at the same scale. Moon is a lumpy little guy: very uneven gravity. It's why almost all low lunar orbits are unstable.
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Perfectly backwards order on @SciGuySpace's poll
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Slop companies with their slop websites are proliferating like nuts in the space industry, I assume everywhere else. Presumably for like >90% if you gave them money nothing useful would come of it. But at some point in the future, vibe engineering will get so good that they could actually do the thing, with only manufacturing as the bottleneck. At that point though, the capital allocators could also do the thing themselves.
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Kevin Cannon retweeted
Big Sky Rising with @ShawnRyan762. Oct 26th we unveil the rocket. Giddyup!
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Estimates coming down for Starship cadence
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Kevin Cannon retweeted
Now interactive: my simulation of 500,000 orbital data center satellites. Pick any latitude, date and time, then explore two brightness models alongside actual stars. App and code in the first reply. Try your sky and report back.
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OK but they will just launch it in a few months, well before VIPER and Artemis...?
Isaacman says NASA ‘dodged a bullet’ with Chinese lunar mission delay spacenews.com/isaacman-says-…
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The @StarbenchA Early Guide to Orbital Data Centers is the best place to get oriented on what's happening with space compute
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Hey @grok, what's a rough estimate for the areal footprint of NASA's Moon Base, and what would an impact like this do to it?
“A truly amazing event occurred sometime between April and May 2024: a new 222-m-diameter crater formed [on the Moon]” lroc.im-ldi.com/images/1501
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The number of heavy-lift launches per Moon landing: Artemis vs. Apollo vs. China:
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OK that is some pretty prominent placement
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Stoke Space saying out loud what's highly inconvenient for a lot of startups. Launch prices are going up unless you're building the rockets.
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Let's say you took the entire power budget of Earth and used it for compute, but ran it further out in the solar system where it's 30× more efficient. How much mass would you need for radiators? Turns out it's like 20% of a comet's worth. [from Garrett 2026].
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Kevin Cannon retweeted
Normally support Paul’s takes, but this is a false equivalence on many levels. Reduction in launch costs ≠ reduction in launch prices. We have multiple paid for and manifested spacecraft on deck. Not only have launch prices not gone down, they’ve in fact gone up. SpaceX (implied here) is not in the business of reducing launch prices for anyone other than themselves evidenced clearly by F9. Plus, for a large constellation like what Starcloud and others propose, launch prices even in the worst (or best) case are a small fraction of the cost of the actual mission. I get pitch decks all the time from satellite companies looking for money. The narrative many have fed investors for the last 10 years pegging their secret sauce to dropping launch costs has not panned out. That doesn’t stop startups from spreading this narrative and investors being fooled, and is the real explanation why some space startups are so good at fundraising — they’re great storytellers and great at creating FOMO. There’s only one way here, and it’s brutal. You need to own launch. That’s why SpaceX works. Low margin business enables a high margin one.
One reason Starcloud has been so successful at fundraising is that it's a bet on launch costs decreasing, and that's like betting on Moore's Law in the 1990s.
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These are all the active SETI (or METI) attempts where signals were broadcast to specific stars, and when we might hear back if anyone is listening. Only 3 are currently open, with a handful more in the 2030s and 40s.
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Kevin Cannon retweeted
ycombinator.com/launches/T9t… Who's making the Kardashev run in less than 12 parsecs? We're here to help! Today launching Ethos Space Resources as a YC Company (S 26) @ycombinator
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The Starbench guide to Orbital Data Centers is now up, available to everyone.
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