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Blue Moon Rising

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I recently read that 2009 will be closing with a blue moon. You know, the blue moon of “once in a blue moon” fame. Maybe you’ve used the phrase and I sure hope you’ve heard it, but you still may be wondering what an actual blue moon is.

A blue moon is an anomaly in which the moon cycle deviates from its formal calendrical rhythm  to produce two full moons in a month resulting in a 13th full moon in the calendar year. I won’t get in to the astronomical details of this occurrence other than the year normally has 12 full moons, one corresponding to each month. With the moon cycle being 29.5 days, you can see how a blue moon can be a inevitable possibility.

Another possibility that ran through my mind while writing this was if there has ever a month in which there were no fulls moons. There indeed has! With February being the only month shorter than the moon cycle, back in 1999, there was no full moon that month. The results of this led to two fulls moons in both January and March. Exciting, I know.

So how stoked are you that the year of 2009 will be ending with an astronomical anomaly on New Year’s Eve? Pretty rad stuff if you ask me. So be sure to let all your ignoramus friends on New Year’s Eve that, “Hey, it’s a blue moon tonight!”

Bonus mp3: Blue Moon – The Marcels

Be Rad. Enjoy.

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Written by theberad

December 17, 2009 at 7:25 pm

One Response

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  1. […] January 29, 2010, marks the first full moon of 2010. If you remember the last full moon was a blue one on New Year’s Eve. This full moon is not only the first of the year but it also going to be […]


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