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Moon and Mercury

Moon and Mercury - Maria formed Essentially geologically...

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Moon and Mercury Moon Mass = 0.012 Earth's Radius = .27 Earth's Density = 3300 Kg/m^3  [ 3.3 kg/liter ] Unusual Motion - synchronous rotation, Review  Tidal interactions. Interior - cool (relative to Earth's core) not iron rich. Crust: thicker on far side, thinner on Earth side Major geologic activity - impact cratering Main features of the surface of the Moon: Maria - dark, smooth (few craters), basalts Highlands - bright, rough, anorthosites Type of rocks: basalts, anorthosites,  breccia, and regolith Probes:  Apollo missions:  First two men on the Moon: Neil Armstrong  and Buzz Aldrin. 'Geologic History' of the Moon Formed from a collision - 4.5 billion years Initially molten Early period of heavy cratering - Highlands  formed Later period few impacts some very large - 
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Unformatted text preview: Maria formed Essentially geologically dead - 3 billion years ago Mercury Mass = 0.055 Earth's Radius = .38 Earth's Density = 5400 Kg/m^3 [5.4 kg/liter ] Unusual motion - resonance rotation Interior - cool, iron-rich core Surface features: Caloris Basin - large impact crater Jumbled terrain - unusual hilly formation on opposite side of the planet from Caloris Basin Intercraterplains - smoothed surface regions possibly from lava flow covering the craters in that region Scarps. - Huge cliffs thought to have form as the planet cooled and contracted. No atmosphere Average temperature: 440 K (167 C) (590-725 K, sunward side) Weak magnetic field Probe: Mariner 10...
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