WASHINGTON, March 2, 2012 /PRNewswire-USNewswire/ -- Astronomers using data from NASA's Hubble Telescope have observed what appears to be a clump of dark matter left behind from a wreck between massive clusters of galaxies. The result could challenge current theories about dark matter that predict galaxies should be anchored to the invisible substance even during the shock of a collision.(Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO)
Dark Matter Core Defies Explanation in Nasa Hubble Image
Abell 520 is a gigantic merger of galaxy clusters located 2.4 billion light-years away. Dark matter is not visible, although its presence and distribution is found indirectly through its effects. Dark matter can act like a magnifying glass, bending an...