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:
“Why look in the dark for light?”
—Henry David Thoreau (1817–1862)
“‘E’s invisible, that’s what’s the matter with him. If he gets the rest o’ them clothes off we’ll never catch him in a thousand years.”
—R.C. Sherriff (1896–1975)