ASTRO-110 Lecture Notes - Lecture 19: Galilean Moons, Surface Roughness, Chemical Equilibrium
9 Sep 2020
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Document Summary
Europa"s interior also warmed by tidal heating. Evidence for a liquid ocean on europa. Tidal heating can keep most of the ice melted beneath a solid crust. Surface structure shows that liquid sometimes wells up from below. Presence of a magnetic field requires an electrically conducting. But it has a magnetic field ! Titan is the only moon in the solar system to have a thick atmosphere. It consists mostly of nitrogen with some argon, methane, and ethane. Huygens probe provided first look at titan"s surface in early 2005. Almost all show evidence of past volcanism and/or tectonics. Mimas recently shown to have a liquid interior. Only 500 km across: expect to be geologically dead. Blue stripes are regions of fresh ice: unusual geological activity. To originate life need a chemical pathway to make complex molecules. To support life need chemical reactions that life can use for metabolism. Atp is re-constructed with energy from external source (sunlight, food, inorganics)
