Astronomers Find Ring of Dark Matter With Hubble Space Telescope
U.S. Newswire, May, 2007
To: SCIENCE EDITORS
Contact: Grey Hautaluoma or Dwayne Brown, Headquarters, Washington, 1-202-358-0668/1726, or Donna Weaver or Ray Villard, Space Telescope Science Institute, Baltimore, 1-410-338-4493/4514, all of NASA
WASHINGTON, May 15 /PRNewswire-USNewswire/ -- Astronomers using NASA's Hubble Space Telescope have discovered a ghostly ring of dark matter that formed long ago during a titanic collision between two galaxy clusters. Dark matter makes up most of the universe's material. Ordinary matter, which makes up stars and planets, comprises only a small percent of the universe's matter. The ring's discovery is among the strongest evidence yet that dark matter exists.
Astronomers have long suspected the existence of the invisible substance and theorized...
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