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"Blue Moon" Shines Friday; Next One's in 2015

By John Charlesworth, Professor of Astronomy at Napa Valley College.

Friday, August 31, 2012 is a “blue moon.” The second full moon within a calendar month is called a blue moon.  

There was a full moon on August 1st, so Friday’s full moon is a blue moon.            

The blue moon looks the same as any other full moon. Why it is called a “blue” moon seems to be lost in antiquity.

Blue moons are not a rare as most people realize. They occur about once
every 2 ½ years. 

The last blue moon was December 31, 2009, and the next one will be July 31, 2015.

So be careful when you say that you will do something, such as takes to kids to Disneyland, “once in a blue moon.”  It might come sooner than you think!

By Astronomy Professor John Charlesworth.

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Ash Leigh August 31, 2012 at 09:22 PM
I plan to be in a boat fishing underneight this blue moon tonight. Split tails are out - which means, Stripers!
Belle (Orchid Lady) September 01, 2012 at 01:56 AM
Have fun!!!! I love fishing!

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