Astronomy Picture of the Day

Shadow of a Martian Robot

Pleiades: The Seven Sisters Star Cluster

Planet Parade over Sydney Opera House

The Egg Nebula from the Hubble Telescope

Webb and Hubble: IC 5332

Sharpless 249 and the Jellyfish Nebula

Lunar Occultation of Mercury

Shapley 1: An Annular Planetary Nebula

Total Lunar Eclipse over Tsé Bit'a'í

The Astrosphere of HD 61005

Two Eclipses of Saros 133

The Aurora Tree