By now I'm sure you've heard that we will have a "Blue Moon" tonight, New Years Eve. How cool is that? We not only get a new year and a new decade but we get an extra moon...a blue moon...to boot!
We use the term Blue Moon more often nowadays than the names of the other twelve moons. The Harvest Moon is probably the second best known. There's the Hunter Moon and the Gibbous Moon. Are you surprised to know that the Egg Moon is around Easter?
The moon won't really be blue. That only happens, well, once in a blue moon. To make the moon appear truly blue you need an atmospheric influence like, say, the eruption of Krakatoa in 1883. But this "extra moon" is called a Blue Moon. Back when the calendar was aligned with the seasons and based on the phases of the moon (moon = month) folks planted and harvested crops based on the appearance of the Early, Mid or Late Moon in a season. Based on the calendar year, a Blue Moon (or a month with two moons) comes along about every 2.8 years more or less. That extra moon (or the third moon in a season with four if you prefer the seasonal way of doing things) was called a Blue Moon so as not to have to rename the Late Moon. That doesn't make them quite as rare as a truly blue moon but still...a Blue Moon on New Years Eve hasn't happened since 1990 and won't happen again until 2028.
So tonight we have an extra full moon, the second one of December 2009. Heaven knows we can certainly use a little something 'extra' to make 2009 memorable for more than loss, economic hardship, wars, crazy folks and ne'er-do-wells.
I'll take a beautiful full moon on the very last night of the year and hope it bodes well for us all. Here's hoping your blue moon turns to gold in 2010 - just like the song says!
Reference: Folklore of the "Blue Moon"
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