Is there really a blue moon?
“A blue-colored moon is rare. But folklore has defined two different kinds of Blue Moons. A Blue Moon can be the second full moon in a month. Or it can be the third of four full moons in a season. The full moon of August 31, 2012 will be considered a Blue Moon.” — earthsky.org
Experts said the next Blue moon will happen on July 31, 2015.
Photo credit: earthsky.org