Mayall's Object

ARP 148

Arp 148, cutely nicknamed Mayall's object, is the remains of a collision between two galaxies, what followed, was the formation of a circular ring galaxy and a long streak which is the other galaxy. The collision between the two original galaxies cause a shockwave which pulled matter into the central core, which subsequently caused it to expand into the ring shape you can see before you. Arp 148 is situated in Ursa Major,otherwise known as "the Great Bear" (Ursa means bear in Latin, and Major means larger), Arp148 is approximately 500 million light-years from Earth.