Those of you who live in the North America* will be treated to a total lunar eclipse tomorrow night (Monday night/Tuesday morning)! The whole thing unfolds over about 3.5 hours, starting at 1:30 a.m. Eastern time.
Lunar eclipses are cool, but slow. They're not like solar eclipses which last a few minutes at most; the shadow of the Earth is quite large, and it takes the Moon a while to move through it (also unlike a solar eclipse, lunar eclipses are perfectly safe to watch with your eyes, with binoculars, or through a telescope without protection). Not only that, there are two parts to the shadow: the outer penumbra, which is very difficult to see when it falls on the Moon, and the much darker umbra, which is what really casts the Moon into the dark. In other words, things really gets started when the Moon moves into the umbra.
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