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dangil t1_jci19cf wrote

Reply to comment by the_fungible_man in Energy can not dissappear or be created, only change form, right? Earth is blasted by the sun 24/7, where does the excess energy go, because I guess it doesn't stay here or we'd cook by mr_greenmash

Heavy nucleus were forged in a Star. Not ours though

Geothermal energy is basically gravitational energy from the formation of the solar system. Also related to the sun.

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Grindipo t1_jcld3tw wrote

Is it you, Lord Kelvin ?

The heat inside Earth comes from the radioactive decay of, well, radioactive elements inside.

It is true that the accretion of a planet releases a lot af heat, but without the radioactivity, the Earth would have cooled in less than a billion year.

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