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I Clusters at center and periphery

  1. Mar 23, 2017 #1
    An acquaintance has told me that the Sloan Digital Sky Survey found clusters of galaxies in which most of the galaxies were divided between the center and the periphery, with a smaller density of galaxies in between. Is this case, and if so, why?
  2. jcsd
  3. Mar 23, 2017 #2


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    Staff: Mentor

    The center and periphery of what?
  4. Mar 23, 2017 #3
    of the cluster
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