A blue moon is a full moon that is not timed to the regular monthly pattern. Most years have twelve full moons which occur approximately monthly, but in addition to those twelve full lunar cycles, each solar calendar year contains an excess of roughly eleven days compared to the lunar year. The extra days accumulate, so that every two or three years (7 times in the 19-year Metonic cycle), there is an extra full moon. The extra full moon is referred to as a "blue moon."
Compare the moon's position from last night with its position on July 4, 2009. Both shots were captured from approximately the same spot....somewhere on my front porch. :-)
Happy New Year!
Photo taken December 31, 2009
New photos posted on most Mondays through Thursdays.
All photos are copyrighted and may not be reproduced or distributed without my expressed, written consent.