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I Clusters at center and periphery

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  1. Mar 23, 2017 #1

    nomadreid

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    Gold Member

    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

    berkeman

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

    nomadreid

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    of the cluster
     
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