Tonight is a Blue Full Moon. The last blue moon occurred on Dec. 31, 2009 and that “New Year’s Eve Blue Moon” also coincided with a partial lunar eclipse (for viewers in Europe, Asia, Africa and some parts of Alaska). This is our last blue moon until 2015.

A Blue Moon – the second of two full moons in one month – aren’t all that rare and aren’t any different in color, but it’s nice that they get more people to look up at the night sky. The next blue moon won’t occur until July 31, 2015, so you should check this one out.

Actually, it’s not an event you have to stay up late to observe. The moon will be at its fullest at 9:58 a.m. EDT on Friday, so you can check it out early morning too.

The really unusual event is a year with two blue moons and the last time we had two months with two full moons was in 1999. The next time double blue moons will occur is in 2018.

Sing along with the moon (and The Marcels)

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