2013 photos: Supermoon
1 / 9
A supermoon rises behind a building of the Topkapi Palace in Istanbul, Turkey, Sunday, June 23, 2013. The moon, which will reach its full stage on Sunday, is expected to be 13.5 percent closer to earth during a phenomenon known as supermoon. The "Supermoon" happens only once this year as the moon on its elliptical orbit is at its closest point to earth. (AP Photo/Gero Breloer)