Aug 14, 2006

Erica Hupp/Dwayne Brown Headquarters, Washington 202-358-1237/1726

Megan Watzke Chandra X-ray Center, Cambridge, Mass 617-496-7998

MEDIA ADVISORY: M06-128

NASA ANNOUNCES DARK MATTER DISCOVERY

Astronomers who used NASA's Chandra X-ray Observatory will host a media teleconference at 1 p m EDT Monday, Aug 21, to announce how dark and normal matter have been forced apart in an extraordinarily energetic collision

Reporters must call Megan Watzke at the Chandra Press Office at: 617- 496-7998 or e-mail: mwatzke@cfa harvard edu for participation information Shortly before the start of the briefing, images and graphics about the research will be posted at:

http://chandra harvard edu/photo/2006/1e0657/

Briefing participants: - Maxim Markevitch, astrophysicist, Harvard-Smithsonian Center for Astrophysics, Cambridge, Mass - Doug Clowe, postdoctoral fellow, University of Arizona, Tucson, Ariz - Sean Carroll, assistant professor of physics, University of Chicago, Ill

A video file about the discovery will air on NASA TV at noon, Aug 21 Audio of the event will be streamed live on the Web at: http://www nasa gov/newsaudio For NASA TV streaming video, schedule and downlink information, visit:

http://www nasa gov/ntv

For information about NASA and agency programs, visit:

http://www nasa gov/home

-end-

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