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:
“When it is dark in the east, it is light in the west; when things are dark in the south there is still light in the north.”
—Chinese proverb.
“What matter though numb nightmare ride on top
And blood and mire the sensitive body stain?
What matter? Heave no sigh, let no tear drop,
A greater, a more gracious time has gone....”
—William Butler Yeats (1865–1939)