Astronomy Picture of the Day

Lunar Craters Langrenus and Petavius

NGC 3717: A Nearly Sideways Spiral Galaxy

Mercury in Silhouette

Mercury and the Quiet Sun

M16 and the Eagle Nebula

The Star Streams of NGC 5907

Young Stars in the Rho Ophiuchi Cloud

Passing Asteroid Arrokoth [video]

Milky Way over Uruguayan Lighthouse

Arp 273: Battling Galaxies from Hubble

Simeis 147: Supernova Remnant

Orion Rising