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Look Up for a Blue Moon Tonight


If there were any night to live up to the expression “once in a blue moon“, it should be tonight. Not only will December 31, 2009 be the final day of the final year of a decade, but it will also be a night when a blue moon appears.

A blue moon is the term for the second full moon in a month, which occurs about once every 2.7 years. The last blue moon to appear on New Year’s Eve was in 1990, and the next won’t happen until 2028!


To read more about engineers who have seen the moon up close and personal (like Neil Armstrong), head over to our Famous Engineers page.

Image: “Blue Moon” by OliBac (Flickr Commons)

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