August 13, 2013
This year's Green Corn Moon, seen here shimmering on the surface of Alaska's Kenai Lake, fell on July 22. That timing allows for two more full moons this summer, making the one Aug. 21 an uncommon blue moon.
Stories this photo appears in:
This month, you will have an opportunity to witness an unusual blue moon, but don’t expect to go outside and see a blue-colored moon staring back at you.