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Rare Blue Moon Will Shine Tonight

Check out tonight's "Blue Moon," which won't actually be blue but will not be seen again until 2015

 

Sky-gazers can enjoy a rare celestial event tonight as the second full moon of August shines overhead.

This "blue moon" refers not to color, but to rarity. Blue moons are defined as either the fourth full moon in a season, or, more recently, as the second full moon in a month. The first full moon this month was on Aug. 1.

Blue moons happen because our calendar months don't precisely sync with the moon's orbit. It takes the moon 29.5 days to wax and wane from full to new to full again. With the exception of February, months are longer than that, meaning that once in a while the timing works out so there are two full moons in one month, according to a story from LiveScience.

Peter Doherty August 31, 2012 at 03:24 PM
Is it made of cheese
slyfox August 31, 2012 at 03:52 PM
It sure was beautiful this morning!
Dirk Helbig September 01, 2012 at 01:27 AM
Did anyone see the cow jumping over it ???
Carl September 01, 2012 at 01:37 PM
No cow, just Alice

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