Astronomers map dark matter in startling detail
http://www.physorg.com/news8932.html

Clues revealed by the recently sharpened view of the Hubble Space
Telescope have allowed astronomers to map the location of invisible
"dark matter" in unprecedented detail in two very young galaxy
clusters. A Johns Hopkins University-Space Telescope Science Institute
team reports its findings in the December issue of Astrophysical
Journal.

See: http://www.physorg.com/news8932.html