GEOL 212 Study Guide - Midterm Guide: Radiography, Radiogenic Nuclide, Exoplanet
26 Dec 2017
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Orbital resonances: left alone, eccentric orbits tend slowly to evolve into more nearly circular ones over time. Io is the solar system champ for tidal heating, but it can have significant effects elsewhere. All moons on this list show signs of significant geologic activity: europa with its thin ice and liquid oceans is also tidally heated. Participates in a 1:2 resonance with io and a 2:1 resonance with. Ganymede: enceladus, which participates in a 2:1 resonance with dione is like a slightly tamer version of io, showing continuous cryovolcanism, ganymede, participates in a 1:4 resonance with io and a 1:2 resonance with europa. One heat source we haven"t considered is the sun. Solar radiation is a significant contributor of heat to the planets" surfaces and atmosphere, but not to their interiors. When we think of a planet"s intrinsic internal heat, we can ignore the sun.
