Learn about the life cycle of a satellite at Goddard Space Flight Center.
NASA is taking part in the celebration of Earth Day's 42nd anniversary on the National Mall in Washington, D.C., from April 20 through April 22, 2012.
NASA's "Beautiful Earth" educational program combines interactive talks and hands-on workshops for students with live music.
These bright stars shine through what looks like a haze in the night sky as part of a young stellar grouping in the Large Magellanic Cloud.
Since SDO's first light in April, 2010, instruments on the spacecraft have continually observed the ever-changing sun on quiet days and explosive ones: observing over 1000 solar outbursts since its launch.
Mexico's Popocatepetl Volcano has re-awakened and has been emitting gas and ash.