AST 111 Lecture Notes - Lecture 9: Fighting Network Rings, Galilean Moons, Oort Cloud

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All the big moons (besides earths) are in the jovian planets. Io"s elliptical orbit means continual changes in the strength and direction of the tidal force from jupiter. And the changing tides flew io"s interior and causes tidal heating. Tidal heating arises because io"s elliptical orbit causes varying tides. Ios orbit is elliptical because of the orbital resonance lo shares with europe and ganymede. Io- is the most volcanically active on the universe ( because the interior is very warm) Io has a very young surface bc its always being remade by volcanoes. Its surface is really weird, and looks like a bunch of fractured ice. More water on europe than there is on all of earth (2 or 3 times) Old ice= dark and dirty young ice= white clearish. Valhalla impact- fractured the ice and made a shock wave of ice (but no water came out)

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