News Release Archive:

News Release 117 of 325

August 27, 2008 10:00 AM (EDT)

News Release Number: STScI-2008-32

A Clash of Clusters Provides New Clue to Dark Matter

August 27, 2008: A powerful collision of galaxy clusters has been captured by NASA’s Hubble Space Telescope and Chandra X-ray Observatory. The observations of the cluster known as MACS J0025.4-1222 indicate that a titanic collision has separated the dark from ordinary matter and provide an independent confirmation of a similar effect detected previously in a target dubbed the Bullet Cluster. These new results show that the Bullet Cluster is not an anomalous case.

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Credit: NASA, ESA, CXC, M. Bradac (University of California, Santa Barbara), and S. Allen (Stanford University)