A runner makes his way along a trail on a butte in front of the "supermoon" at Papago Park in Phoenix, Arizona May 5, 2012. A "supermoon" will light up Saturday's night sky, May 5, in a once-a-year cosmic show, overshadowing a meteor shower from remnants of Halley's Comet, the U.S. space agency NASA said. The Moon will seem especially big and bright since it will reach its closest spot to Earth at the same time it is in its full phase, NASA said.

The biggest full moon of the year rises 5 as Earth's only satellite swings into its perigee, or closest approach to Earth. This so-called "supermoon" appears extra big and extra bright.