The moon rises over the New York skyline on Tuesday, Aug. 20, 2013, as seen from West Orange, N.J. The moon is the third full moon of four in the summer season, better known as a blue moon to scientists. It also means it's the second full moon in the past 30 days.
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A plane cruises in front of the moon above West Orange, N.J.
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Greeks and tourists watch the rising moon above the ancient Acropolis in Athens on Tuesday, Aug. 20, 2013. Greece will celebrate the August full moon on Aug. 21 with various events at its archaeological sites and museums across the country.
Louisa Gouliamaki/AFP/Getty Images
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A cyclist rides along the Tagus river bank in Lisbon, Portugal.
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Fans attend a baseball game between the Kansas City Royals and the Chicago White Sox as a full moon rises in Kansas City, Mo.
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The full moon halos a flower in downtown LaPorte, Ind.
Bob Wellinski/The LaPorte Herald-Argus/AP
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People watch the moon from a viewpoint on Cypress Mountain in West Vancouver, British Columbia.