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The Moon - PowerPoint PPT Presentation


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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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moon basic facts
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)
geology of the moon
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
what it means
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