[ELI5] Would something stay hot in the space forever since there is nothing to transfer its heat?
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If you’re curious, you could look up some info on the James Webb Space Telescope. In order to operate, it must be as close to absolute zero as it can get. We had to wait for the telescope to cool down on its own, then use a chiller to drop the temperature further. I’m sure there’s a lot of good info out there about cooling this telescope that could help you learn a lot more about how things cool in space and how heat radiates.
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