The moon turns blood red in this 3:30 a.m. ET view of the total lunar eclipse on April 15, 2014 as seen by a telescope at the University of Arizona's Mt. Lemmon SkyCenter at Steward Observatory atop Mt. Lemmon, Arizona.
On Sunday (Sept. 27), skywatchers across the United States will be in for a special treat: The full "supermoon" (a full moon when the moon is closest to Earth in its orbit) will go into eclipse. A lunar eclipse occurs when the moon passes into the shadow of the Earth.