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The Moon

The Moon. Moon: Basic Facts. Diameter: 3500 km (2100 miles) Average Distance: 380,000 km (240,000 miles) Distance range: 360,000 – 400,000 km Orbital eccentricity: .05 Orbital inclination: 5 degrees Earth is 4x as large, 81x as massive Bulk density: 3.3 gm/cc (3400 kg/m 3 ).

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The Moon

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  1. The Moon

  2. Moon: Basic Facts • Diameter: 3500 km (2100 miles) • Average Distance: 380,000 km (240,000 miles) • Distance range: 360,000 – 400,000 km • Orbital eccentricity: .05 • Orbital inclination: 5 degrees • Earth is 4x as large, 81x as massive • Bulk density: 3.3 gm/cc (3400 kg/m3)

  3. Geology of the Moon • Cratered Highlands • Crater saturated • Every point has been cratered • Large late basins • Late Heavy Bombardment • Lunar Mountains are Basin Rims • Dark plains (Maria) • Lava flows • Low crater density • Recent bright craters

  4. What it means • Early accretion of Solar System • Every accretion event is an impact • Final stages of accretion swept up large bodies • After the Late Heavy Bombardment, accretion rate slowed dramatically • Long afterward, lava filled some basins • Little internal activity since maria flooding • Rare large impacts

  5. Basic Planetary Stuff

  6. We Can Expect Basalt to be Very Abundant in the Universe

  7. Anorthosite: Lunar Highland Rock

  8. With Some Very Simple Science, We Can Understand the Geology of the Moon

  9. The Moon

  10. Earth and Moon Histories

  11. Earthshine

  12. Lunar Rilles

  13. How Lunar Rilles May Form

  14. A “Lunar” Landscape?

  15. Real Lunar Mountains

  16. How We Got It So Wrong

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