Astronomy Picture of the Day

NGC 253 Close-Up

Young Suns of NGC 7129

A Solar Prominence Unfurls

Earth at Night

Layers of Red Cliffs on Mars

Dust Mountains in the Carina Nebula

Mercury as Revealed by MESSENGER

Massive Stars in NGC 6357

Irregular Galaxy NGC 55

Bright Bolide

Spiral Galaxy NGC 3370 from Hubble

Cassini Passes Through Ice Plumes of Enceladus