I know radiators exist. The space station has them, and satellites use them too. My point is scale. Servers are a different animal. A real server facility produces a lot of heat per square meter. Almost every watt going in becomes heat, and that heat has to be removed all the time. I just became more aware of this with my own solar system lately, how much ventilation and cooling air matters. That is why the challenge in a no atmosphere environment strikes me. So yes, radiators work. The real question is how big they must be, how heavy, how expensive, how exposed, and how many failure points you create when you scale it up to server farm level. That is also why I'm pointing at the moon Moon as a future possiblity. If this is not realistic as a free flying satellite or server flying farm, could the Moon make more sense long term? It has space, material, and maybe the possibility to build proper facilities with an internal cooling atmosphere to move heat around. The heat still has to go somewhere. That is the core issue.
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