An international team of astronomers using the NASA/ESA Hubble Space Telescope has discovered a ghostly ring of dark matter formed long ago during a colossal collision between two galaxy clusters. This is the first time that dark matter has been found with a distribution that differs substantially from the distribution of ordinary matter. Video date- 15-May 2007. Video source- http://www.spacetelescope.org/videos/html/heic0709a.html Blog with a basic summary of our understanding of dark matter- http://blog.myspace.com/index.cfm?fuseaction=blog.view&friendID=120129993&blogID=223043141&Mytoken=625A943A-464F-4BB6-B4E765FA1AB94D5926636261
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