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svantanatoday at 9:27 AM2 repliesview on HN

How hot do you think black objects in space get? Something like 10°C. Look up thermal equilibrium of an ideal black body.


Replies

adastra22today at 11:18 AM

In the vicinity of the Earth, they get to about the temperature of the Earth. That’s not a coincidence. Hotter if they are actively generating heat.

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philipallstartoday at 10:34 AM

But are they doing work internally that generates heat? Genuine question.