Why does the Moon appear red during an eclipse? While the Moon remains completely within Earth’s shadow, some indirect sunlight still manages to reach and illuminate it. The small amount of light that does hit the Moon comes around the Earth after bending through the Earth's atmosphere. This light is deep red or orange for the same reason that sunsets are red. Rays of white sunlight passing through the atmosphere are subject to "scattering." Blue light sprays off in all directions (this is why the daytime sky glows blue), but the red light is relatively unaffected, so it continues through.

Don't forget about tommorow night's skyshow.