 When first discovered, Mayall's Object 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 galaxies, resulting in a new object consisting of a ring-shaped galaxy with a tail emerging from it.It is thought that the collision between the two galaxies created a shockwave that initially drew matter into the center which then formed the ring.