Putting AI in space is a silly idea. How do you cool it reliably? How do you handle rad-hardness? How do you even get the gear up there? It's one of the most expensive places to put mass.
Using geothermal power or floating solar arrays in the ocean makes way more sense. It's much easier to access, you have water for a heat sink, and you're far away from anyone or anything that would really care.
More controversially, if geothermal or solar doesn't pan out, you could power it via nuclear microreactors (just what I want floating in my world's ocean) or gas that would otherwise be flared off from a deep sea oil well (CO2 non-withstanding).
Satellite cooling is long figured out, the problem is that it requires a ton of expensive mass.
Radiation hardening is not a huge issue in LEO either. It is an issue, not the issue.
Overall, it's like choosing international flights as your choice of a restaurant. It's...fundamentally...doable...? But nobody knows why you would want that, unless flying GPUs is the point rather than to offer a competitive service using the server sats.
I think the cooling mass is so expensive and fragile that it’s basically an unsolved problem.
No, I mean, you can fly daily from NYC to London and back every single night for 5 years straight just to use the business class seats to sleep and to have inflight meals as your dinners and your breakfasts. That would be a 100% feasible solved problem from technical standpoint. But why would you do that.
They can probably build like, a gigantic satellite that fits in an expendable Starship that has like just couples of RTX5090 32GB backed by a Tesla battery pack and a gigantic multi panel actively refrigerating radiator system. Or use bunch of such Starships to assemble a whole rack worth of GPUs on orbit that costs billions total and minimum half a year to build out. Satellites and radiators are solved good enough for that.
Or you can put just the computer part on a desk indoor on Earth and plug it into the wall and have it cooled with fans. Or have a guy roll up an air cooled rack full of GPUs next to it. Why involve the rockets and satellites and all. What's the point. That's what everyone is puzzled with.
Someone made a good point on a previous comment like this: the main selling point is the public can’t destroy them
The public doesn't need to. If these companies actually try to build datacenters in space they will bankrupt themselves. It's a ridiculously stupid idea.
That sounds like a fun challenge! DIY ASAT when?
It is expensive, but the radiators won't necessarily push the state of the art. https://arstechnica.com/space/2026/07/how-hard-is-it-to-buil... The current test is to see how big an issue rad-hardness actually is.
Scott Manley has an excellent video breaking down the math on cooling.
It’s totally doable.
https://m.youtube.com/watch?v=FlQYU3m1e80
The fact that this comment is being downvoted says so much about so many things. And so many people. This community--not just HN, I'm talking about tech at large--has totally lost its way.