Phases , Eclipses, & Tides. The moon is Earth’s closest neighbor out in space at 384,400 kilometers out in space or 30 Earths lined up in a row. The moon revolves around the Earth as the Earth revolves around the sun.
Motions of the Moon:
Phases of the Moon:
The umbra is the darkest and smallest part of the shadow & is cone shaped (total darkness).
The penumbra is the largest part of the shadow (partial darkness).