This Thursday evening, May 31st, the moon over North America will become full for the second time in the month of May. According to folklore, that makes it a blue moon. But will it really be blue? Believe it or not, blue-colored moons are possible. Read today's story for a look at the folklore and physics of blue moons.

FULL STORY at

http://science.nasa.gov/headlines/y2007/30may_bluemoon.htm?list882224

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