Supermoon A Dazzling Optical Illusion

The moon is seen in its waxing gibbous stage as it rises behind the helicopter from the original Batman television show, which people can ride at the New Jersey State Fair, Saturday, June 22, 2013, in East Rutherford, N.J. 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. (AP Photo/Julio Cortez) (AP2013)

A full moon rises behind the Jefferson Memorial in Washington Saturday, June 22, 2013. The larger than normal moon called the "Supermoon" happens only once this year as the moon on its elliptical orbit is at its closest point to earth. (AP Photo/J. David Ake) (AP2013)

A full moon rises through a hazy sky past a string of green lights, Saturday, June 22, 2013, in Baltimore. 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. (AP Photo/Patrick Semansky) (AP2013)

A cotton candy vendor, center, walks in from of the moon during the Los Angeles Angels' baseball game against the Pittsburgh Pirates, Saturday, June 22, 2013, in Anaheim, Calif. (AP Photo/Mark J. Terrill) (THE ASSOCIATED PRESS2013)

A full moon rises beyond a Latter-day Saints temple Saturday, June 22, 2013, in Kansas City, Mo. 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. (AP Photo/Charlie Riedel) (AP2013)

The moon is seen in its waxing gibbous stage as it rises over Lower Manhattan, including One World Trade Center, center, seen from The Heights neighborhood of Jersey City, N.J., Saturday, June 22, 2013. The moon, which will reach its full stage on Sunday, is expected to be seen 13.5 percent larger than usual during a phenomenon known as supermoon. (AP Photo/Julio Cortez)

A full moon rises over Miami, Saturday, June 22, 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. (AP Photo/Alan Diaz)

A full moon rises beside the Bank of America corporate headquarters in downtown Charlotte, N.C., Saturday, June 22, 2013. The larger than normal moon called the "Supermoon" happens only once this year as the moon on its elliptical orbit is at its closest point to earth.(AP Photo/Chuck Burton) (AP2013)

A "supermoon" rises behind roadside plants growing in Prattville, Ala., Saturday, June 22, 2013. The biggest and brightest full moon of the year graces the sky early Sunday as our celestial neighbor swings closer to Earth than usual. While the moon will appear 14 percent larger than normal, sky watchers won't be able to notice the difference with the naked eye. Still, astronomers say it's worth looking up and appreciating the cosmos. (AP Photo/Dave Martin)

A hazy "supermoon" is seen behind lighted smoke stacks at the Alamo Quarry Markey, formerly a cement factory, Saturday, June 22, 2013, in San Antonio. The biggest and brightest full moon of the year graces the sky early Sunday as our celestial neighbor swings closer to Earth than usual. While the moon will appear larger than normal, sky watchers won't be able to notice the difference with the naked eye.(AP Photo/Eric Gay) (AP2013)