Mayall's Object Traditional Geocache

Mayall's Object

Mayall's Object is the result of two colliding galaxies located 450 million light years away within the constellation of Ursa Major. It was discovered by Nicholas U. Mayall of the Lick Observatory on 13 March 1940, using the Crossley reflector. At discovery, it was described as a peculiar nebula shaped like a question mark. Originally theorized to represent a galaxy reacting with the intergalactic medium, it is now thought to represent the collision of two original galaxies that resulted in a new object consisting of a ring-shaped galaxy with a tail emerging from it. It is thought that the original collision between the two original galaxies created a shockwave that initially drew matter into the center which then formed the ring.