eli5 – How is space cold?

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How is space “cold” when it’s a vacuum? Isn’t temperature transferred between mass? If anything, shouldn’t you overheat when in a vacuum, because your body generates heat?

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Anonymous 0 Comments

Yes and yes. Space is cold in the sense that there’s very little to conduct heat, but objects in space are at a serious risk of overheating (because other types of radiation can be transformed into heat) as it can be so difficult to get rid of.

NASA has a page about this and the International Space Station:

– https://science.nasa.gov/science-news/science-at-nasa/2001/ast21mar_1

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