A perigee moon is when the moon is at its closest to the earth. This phenomenon has occured three times this year.
Setting sun illuminates cumulus clouds as full moon rises in Apfeltrang, southern Germany,.KARL-JOSEF HILDENBRAND/AFP / Getty Images
The full moon behind a cross on a church in Minsk. also known as a Harvest Moon, is the third and final "supermoon" of 2014. The phenomenon, which scientists call a "perigee moon," occurs when the moon is near the horizon and appears larger and brighter than other full moons.MAXIM MALINOVSKY/AFP / Getty Images
The full moon silhouettes the statue of the Virgin Mary on top the University of Notre Dame's golden dome in South Bend, Ind.Robert Franklin/The Associated Press
Visitors to The London Eye ferris wheel view the near full moon in Whitehall in London, England.Peter Macdiarmid/Getty Images
Queen's University student Lindsay Meier takes a picture of the full moon as it rises over Lake Ontario in Kingston, Ont.Lars Hagberg/The Canadian Press
A full moon rises past thunder clouds near Encinitas, California.MIKE BLAKE/Reuters
A couple sits on a bluff overlooking the Missouri River as the full moon rises in the distance Kansas City, Mo.Charlie Riedel/The Associated Press
A full moon rises over a horse pasture in Halton Hills, Ontario outside Toronto.HYUNGWON KANG/Reuters
The moon rises with an orange glow as people watch from a rock cliff at Bondi Beach in Sydney.Rick Rycroft/The Associated Press