- Physical Characteristics
- Located in Boötes constellation, containing only 60 galaxies
- Has radius of 62 megaparsecs (330 million light-years)
- Discovered in 1981 by Robert Kirshner
- Center located 700 million light-years from Earth
- Hercules Supercluster forms near edge
- Formation Theory
- Theorized to form from merger of smaller voids
- Similar to soap bubbles coalescing
- Contains tube-shaped region with few galaxies
- Confusion with Barnard 68
- Often confused with dark nebula Barnard 68
- Barnard 68 is much darker due to physical mass blocking light
- Barnard 68 is closer and has fewer stars in front