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January 10, 2013

Galactic Pile-Up May Point to New 'Dark Force'

Adam Mann, Wired


AP Photo

LONG BEACH, California — By closely mapping the mass of an enormous galactic collision, astronomers may have uncovered a type of force that only affects dark matter.

The results come from observations of the Musket Ball Cluster, a vast celestial object located about 5.23 billion light-years away in the constellation Cancer. Galaxies are usually gravitationally bound to other galaxies, creating massive galactic clusters.

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TAGGED: galaxy clusters, astronomy, dark matter

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