An good site for information about Lunar Eclipses, with excellent diagrams. This page has the best viewing graphics, but a printable page can be easily selected.

What happens to a spacecraft that relies on sunlight to power its batteries when it travels through the Earth's shadow? The Lunar Prospector survived several Penumbral and Umbral eclipses. Resource includes a link to a video that...

Learn how the two types of eclpises occur.