Astronomy Picture of the Day

Solar Minimum versus Solar Maximum [video]

Aurora and Milky Way over Norway

Deep Field: The Heart Nebula

Supernova Remnant Cassiopeia A

Betelgeuse Eclipsed

Crescent Enceladus

Geminids over China's Nianhu Lake

The Same Color Illusion

NGC 1499: The California Nebula

Ice Halos over Bavaria

Three Galaxies and a Comet

183 Days in the Sun