The Earth’s MoonThe Earth’s Moon

A few basicsA few basics

Radius: 1738kmRadius: 1738km Density: 3.34 g/cubic cmDensity: 3.34 g/cubic cm Mean distance: 384,000 kmMean distance: 384,000 km Orbital period: 27.3 daysOrbital period: 27.3 days

Phases of the MoonPhases of the Moon

Side of the Moon facing the Side of the Moon facing the EarthEarth

Lunar LibrationLunar Libration

Moon at Apogee and Moon at Apogee and perigeeperigee

Moon at first quarterMoon at first quarter

Moon: NearsideMoon: Nearside

Moon: farsideMoon: farside

Riddling out the history of the Riddling out the history of the moonmoon

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

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