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Article: JOHNS HOPKINS TEAM FINDS RING OF DARK MATTER
- Article from:
- US Fed News Service, Including US State News
- Article date:
- May 15, 2007
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Johns Hopkins University issued the following news release:
Using NASA's Hubble Space Telescope, a team of astronomers has discovered a ghostly ring of dark matter that formed long ago during a titanic collision between two massive galaxy clusters. The ring's discovery is among the strongest evidence yet that dark matter exists.
Astronomers have long suspected the existence of the invisible substance as the source of additional gravity that holds together galaxy clusters. Such clusters would fly apart if they relied only on the gravity from their visible stars. Although astronomers don't know what dark matter is made of, they hypothesize that it is a type of elementary particle that ...