Four galaxies are involved in this pile-up 280 million light years from Earth. The bright spiral galaxy at the center of the image is punching through the cluster at almost two million miles per hour.
All together, the galaxies are known as Stephan’s Quintet, the first compact galaxy group ever discovered. The large spiral galaxy seen at bottom left is actually a foreground object a mere 35 million light-years from Earth. Read more here or here and see more colliding galaxies here.
