|MadSci Network: Astronomy|
Given, in a system the sum of matter and energy does not change. Where is the source of energy in the following system? As Europa orbits Jupiter, it gets deformed by the enormous gravitational forces (tides), this kneading of its thick, icy surface (?60km) would create sufficient friction to heat the core (electromagnetic energy) and possibly have some of the ice liquify. The question is, if energy is apparently created, where is it sucked from? Would the orbit be affected (decaying)?
Re: Where is the energy coming from?
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