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root-parenttoday at 10:57 AM4 repliesview on HN

Data Centers in Space are a practical engineering impossibility, as well as making no economic sense. Engineering and the laws of physics get on the way.

Just because Scott Manley refuses to call that out, so he can do another eight videos about it, don´t stop listening to somebody with the feet on the ground:

"Orbital Data Centers: Spacecraft Constraints and Economic Viability" - https://arxiv.org/abs/2604.27197

"Hot AI in Cold Space: Thermal-Crosstalk-Aware Scheduling for Sustainable Orbital AI Clusters" - https://arxiv.org/abs/2606.26150

"Above the Cloud: Building Data Centers in Space - Richard Campbell - NDC Copenhagen 2026" - https://youtu.be/eo7MEPgWGic

"Space Data Centers Are Dumb" - https://youtu.be/-w6G7VEwNq0


Replies

ryandvmtoday at 3:35 PM

Nobody in this industry with a modicum of applicable expertise believes that orbital data centers make sense financially. Like colonizing Mars and most of Elon's pipe dreams, it's not the stated goal they believe in, it's getting fabulously wealthy from fat government contracts along the way.

Once you understand this about Musk, you realize that everything he is involved with works that way.

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nancyminusonetoday at 2:27 PM

I don't think they are impossible, just impractically expensive. That should be no problem for AI companies and their infinite access to capital. Nobody wants datacenters to be built around here on the ground, so I say get to spending.

If it ends up bankrupting them, even better.

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aeternumtoday at 2:39 PM

Good thing Elon's companies have a history of moving engineering impossibilities from impossible to slightly late.

Remember when globally competitive electric cars, re-usable boosters, catching a rocket with chopsticks, playing a fps game via a brain implant, and maintaining a satellite constellation at 480km LEO were also impossible?

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vonneumannstantoday at 2:50 PM

>Data Centers in Space are a practical engineering impossibility,

Not really, thermal radiators are well understood and the size needed aren't really that unreasonable. Radiation hardening the GPUs is probably the single hardest problem along with actual launch costs.

>making no economic sense

Yes this is the real issue, Spacex would need to reduce the cost of launches by ~10x with Starship for it to ever be viable.