this post was submitted on 21 Nov 2025
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"Easy" is not the word I would use. But it's fairly simple. Space is ~-250*F. Run a closed liquid cooling loop into the walls of the craft or something.
That's not how space works though. It's a vacuum. It doesn't work the same way as on earth. What temperature do you think the side pointing to sun is? And what temperature do you think the side that is away from the sun is? Heat is just not going to magically transfer into space.
There's nothing magical about heat transfer.
Yes there is. You need to be able to transfer heat to something else. It doesn't just magically disappear. Space is a vacuum. I think you watch too many movies. You probably think that people will just instantly freeze in space without gear on.
I'll give you an example. Do you have one of those water bottles that can keep your drink cold for like a day? The space in between is a vacuum. Why do you think that the liquid inside can say so cold for so long? It's the same principle. Imagine a data center floating around in this space, there is nowhere for the heat to go.
The reason why earth is warm is because the sun radiates and heats up the ground on earth. This is also why it's colder the higher you go within the first few layers of our atmosphere and hotter near the ground.
Basically, you have to radiate heat away from the data center in this case or transfer heat to one area or the other. It's not as simple as being like, hey space, take my heat will you? There is nothing to transfer it to.
Oh okay. In that case , it's cooled with magic. 🪄