January 10, 2013
Galactic Pile-Up May Point to New 'Dark Force'
Adam Mann, Wired
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.
TAGGED: galaxy clusters, astronomy, dark matter