NGC 4676: When Mice Collide 3.8

This week is a picture of two galaxies, known as "The Mice," which are colliding repeatedly until they coalesce into one galaxy. They are known as the mice because they both have long tails, which are formed as a result of the difference in the gravitational pulls on the different ends of the galaxies. The two galaxies lie within the constellation Coma Bernices.