Astronomy Picture of the Day

CG4: A Ruptured Cometary Globule
Crescent Neptune and Triton
The Edge of Space
Elephant, Bat, and Squid
NGC 7814: Little Sombrero with Supernova
Colors: Ring Nebula versus Stars
Thor's Helmet
Framed by Trees: A Window to the Galaxy
The Andromeda Galaxy in Ultraviolet
Alphonsus and Arzachel
Love and War by Moonlight
The Dark Tower in Scorpius