- 13. We Haven't Finished Yet - there are Seven
- David Koo of the University of California at Santa Cruz, along with Alexander Szalay of Johns Hopkins University, and Richard Kron and Jeffrey Munn of the University of Chicago surveyed the North Galactic Pole from Kitt Peak National Observatory in Arizona. Thomas Broadhurst and Richard Ellis of the University of Durham did a similar survey of the South Galactic Pole from the Anglo Australian Observatory in Australia. They searched further than anyone had done before, a total of about 5 billion light years.
- They found something astonishing. When they drew the hundreds of galaxies that had been measured they discovered that they were organized in clumps. The Super Clusters appear at regular intervals, 400 million light years apart. Each clump contains the same density of galaxies. There are seven clumps (including the Great Wall) to the North, and seven to the South. Koo suspects that we may be seeing a whole series of ‘Great Walls’. Between these clumps are very few galaxies. Koo says that people are very disturbed at such regular spacing.
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