Dark Matter
About 90% of the mass of the Coma cluster is believed to be in the form of dark matter. However, the distribution of dark matter throughout the cluster is poorly constrained.
Read more about this topic: Coma Cluster
Famous quotes containing the words dark and/or matter:
“On a starred night Prince Lucifer uprose,
Tired of his dark dominion, swung the fiend
Above the rolling ball in cloud part screened,”
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—David Elkind (20th century)