Chaotic42
07-18-2004, 08:53 PM
The Andromeda Galaxy (M31), our nearest galactic neighbor at about 2 million light years (11,756,999,600,000,000,000 miles or 18,921,056,800,000,000,000 kilometers) away, has two nuclei. Some scientists believe that super-massive black holes cause them to orbit around each other.