RedOrbit - April 4, 2013 - John P. Millis, Ph.D.
For decades scientists have wondered whether a mysterious form of matter – known simply as Dark Matter since it does not interact directly with light – makes up the majority of the “stuff” in the Universe.
Researchers have pointed to the seminal work on the Bullet Cluster of galaxies as evidence that dark matter is a real substance. But similar observations of other galaxy clusters have yielded inconclusive results.
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