Eli5 why is Jupiter surface is gas if it’s so far from the Sun?
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~~Jupiter is a failed star.~~ It generates and emits vast amounts of heat energy from the pressures of helium and hydrogen collected by its enormous gravity. It’s not exactly “cold” there. In fact, if you dove deep enough into its atmosphere you’d find a layer where the ambient temperature would be comfortable for an Earthling, although the pressures at that depth would certainly crush you without a significant (impossible?) pressure vessel.
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