10F_q_Moon - Apollo 17 landing site (1972) Formation of the...

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Unformatted text preview: Apollo 17 landing site (1972) Formation of the Moon Density difference b/w Earth and Moon Densities Earth = 5.5 g/cc Moon = 3.3 Angular momentum of Earth-Moon system Processes associated with Nebular hypothesis Hypotheses must be consistent with: Formation of the Moon Fission Co-accretion Capture - still around Giant impact- favored today Painting by A.T. Kamajian Hypotheses metallic Iron rocky material Computer Simulation (A.G.W. Cameron) Densities Earth = 5.5 Moon = 3.3 Giant impact hypothesis Density = 3.3 g/cc Mass = ~1.2% of earth Density = 5.5 g/cc Radius = 1736 km Radius = 6370 km Ave ~384,000 km Moon Earth Earth ~27 days to rotate on axis ~27 days to revolve around Earth Sun Fixed point on moon We always see same half (57%) of the moon from earth Average surface temperatures Day 107C Night -153C Crust ~60-100 km (feldspar-rich rock) - thinner on near side Increase in seismic wave velocities define crust-mantle boundary (more ferro-magnesian minerals in mantle)...
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10F_q_Moon - Apollo 17 landing site (1972) Formation of the...

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