The Earth

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The Earths Moon
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A few basics

• Radius 1738km
• Density 3.34 g/cubic cm
• Mean distance 384,000 km
• Orbital period 27.3 days

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Phases of the Moon
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Side of the Moon facing the Earth
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Lunar Libration
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Moon at Apogee and perigee
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Moon at first quarter
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Moon Nearside
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Moon farside
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Riddling out the history of the moon

• There was a long argument as to whether the
  craters of the moon were volcanic or caused by
  impacts

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A Michigan native, Ralph Baldwin, helped turn the
argument in favor of impacts
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