The Earth’s Moon
A few basics
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Radius: 1738km
Density: 3.34 g/cubic cm
Mean distance: 384,000 km
Orbital period: 27.3 days
Phases of the Moon
Side of the Moon facing the Earth
Lunar Libration
Moon at Apogee and perigee
Moon at first quarter
Moon: Nearside
Moon: farside
Riddling out the history of the
moon
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There was a long
argument as to
whether the craters of
the moon were
volcanic or caused by
impacts
A Michigan native, Ralph Baldwin, helped turn the
argument in favor of impacts