Only 11 million light-years away, Centaurus A is the closest active galaxy to planet Earth. Spanning over 60,000 light-years, the peculiar elliptical galaxy, also known as NGC 5128, is featured in this sharp color image.
Arp 227 consists of two galaxies in the constellation Pisces: the large (250,000 light-years across) lenticular galaxy NGC 474 (also known as UGC 864) located about 93 million light-years away, and the spiral galaxy NGC 470 at about 95 million light-years away. They lie at a separation of about 160,000 light-years. - Credit: NASA
For reasons unknown, NGC 6357 is forming some of the most massive stars ever discovered. The central part of NGC 6357 shown spans about 10 light years and lies about 8,000 light years away toward the constellation of the Scorpion. Credit: NASA
Hoag's Object is a mysterious ring galaxy 600 million light years away in the constellation Serpens. The outer ring is composed largely of hot blue stars, while the core is older red and yellow stars. The space in between is almost completely dark. It is thought that this galaxy formed from the collision of two galaxies billions of years ago. Visible near the top of the gap is another ring galaxy, likely much further away.