When a giant, full blue moon rises, it's bound to capture the imaginations of sky watchers the world over. What does it really mean though?
According to the now-defunct Maine Farmers' Almanac, each season has three full moons, but when a fourth appears, it's considered a blue moon. Due to an error in the March 1946 issue of Sky & Telescope magazine, however, people commonly interpret a blue moon to mean the arrival of a full moon in a month that already had one. Regardless of rival definitions, a blue moon only occurs once every two to three years and is a spectacular sight to witness. We've collected some mesmerizing images of the August 2013 blue moon snapped by moonstruck photographers around the globe.
Western wildfires turned the blue moon orange in this picture courtesy of Dave Berg. The photographer, located near Geneseo, Ill., used a Canon EOS 60D for the amazing photo.
August 21, 2013 1:48 PM PDT
Photo by: Dave Berg
| Caption by: Christopher MacManus, Leslie Katz
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