Blue Moon for New Year’s Eve

This New Years Eve 2010 will be a rare eve as the moon will be 'blue'. The New Year's eve blue moon, actually, is not about the moon turning into blue color. The term refers to an extra full moon in a month, which occurs every 2.5 years.

A full moon occurred on Dec. 2, 2009. Having another full moon on January 1, 2010, not even completing a full month, makes the New Year's eve a blue moon.

Where can you watch for the blue moon? The New Year's Eve blue moon will be visible in the United States, Canada, Europe, South America and Africa. For partygoers in Australia and Asia, the full moon does not show up until New Year's Day, making January a blue moon month for them.

A full moon occurs every 29.5 days, and most years have 12. The last time there was a lunar double take was in May 2007. New Year's Eve blue moons are rarer, occurring every 19 years. The last time was in 1990; the next one won't come again until 2028.
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