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Science Missed Monday night's lunar eclipse? Here's how to catch the next one. (+video)

The 'blood moon' visible Monday night and early Tuesday morning was the first of four total lunar eclipses that will occur in a regular pattern over the next two years.

By Staff writer / April 15, 2014

Arnulfo Franco/AP

Last night's "blood moon" was the first of four total lunar eclipses that will occur in a regular pattern over the next two years. This series of four is known as a "tetrad," and it's caused by the shape of Earth's orbit.