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Jupiter Was Formerly Twice Its Current Size and Had a Much Stronger Magnetic Field (www.caltech.edu)

submitted 2 weeks ago by Pro@programming.dev to c/space@mander.xyz

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[–] WoodScientist@sh.itjust.works 7 points 2 weeks ago (1 children)

Gas giants get denser with time. They're, by definition, mostly made of gas. And gas significantly expands or contracts based on temperature. I'm sure a terrestrial planet like Earth shrinks slightly as it's cooled from its founding, but nothing compared to a gas giant. Jupiter was much hotter earlier on. So as it cooled, it became less puffed up.

[–] muhyb@programming.dev 3 points 2 weeks ago

I see. Its core temperature is closer to a planet than a brown dwarf I guess. Though I have found this. Well, space is amazing.