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Dwayne Brown/Grey Hautaluoma
Headquarters, Washington
(202) 358-1726/0668

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

April 17, 2006
NASA Announces Black Holes Found to be "Green"
Astronomers using NASA's Chandra X-ray Observatory will hold a media teleconference at 1 p.m. EDT Monday, April 24, to announce a fundamental discovery about black holes.

Reporters must call the Chandra Press Office at (617) 496-7998 or email by 11 a.m. April 24 for participation information. Images and graphics supporting the briefing will be posted online at the start of the briefing at:

Audio of the event will be streamed live on the Web at:

Briefing participants:
- Steven Allen, assistant professor, Stanford University, Palo Alto, Calif.
- Christopher Reynolds, associate professor, University of Maryland, College Park
- Kimberly Weaver, astrophysicist, Goddard Space Flight Center, Greenbelt, Md.

A video file about the discovery will air on NASA TV on April 24. NASA TV is carried on an MPEG-2 digital signal accessed via satellite AMC-6, at 72 degrees west longitude, transponder 17C, 4040 MHz, vertical polarization. It's available in Alaska and Hawaii on AMC-7 at 137 degrees west longitude, transponder 18C, at 4060 MHz, horizontal polarization.

For information about NASA and agency programs, visit:


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