Dolores Beasley
Headquarters, Washington      Sept. 30, 2002
(Phone: 202/358-1753)

Steve Roy
Marshall Space Flight Center, Huntsville, Ala.
(Phone: 256/544-6535)

Megan Watkze
Harvard-Smithsonian Center for Astrophysics, Cambridge, Mass.
(Phone: 617/496-7998)

NOTE TO EDITORS: N02-67

SPACE SCIENCE UPDATE, OCTOBER 3: NEW OBSERVATION 
REVEALS STRANGE LIFE CYCLE OF BLACK-HOLE X-RAY JETS

     Using NASA's Chandra's X-Ray Observatory, for the first 
time astronomers have observed the X-ray jets from a black 
hole over their entire lifetime, from initial explosion to 
ultimate disappearance. 

What this discovery means and the puzzles it presents will be 
discussed during a Space Science Update at 1 p.m. Eastern, 
Thursday, Oct. 3. The Update will be held in the James E. 
Webb Auditorium at NASA Headquarters, 300 E St. SW, 
Washington.

The panelists will be:
*  Neil DeGrasse Tyson, Director of the Hayden Planetarium, 
American Museum of Natural History, New York
*  John Tomsick, Scientist, Center for Astrophysics and Space 
Sciences, University of California at San Diego
*  Philip Kaaret, Astrophysicist, Harvard-Smithsonian Center 
for Astrophysics, Cambridge, Mass.  
*  Kim Weaver, Astrophysicist, NASA Goddard Space Flight 
Center, Greenbelt, Md.
*  Paul Hertz, Senior Scientist and Chandra Program 
Executive, Astronomy and Physics Division, Office of Space 
Science, NASA Headquarters.

The Space Science Update will be carried live on NASA 
Television with two-way question-and-answer capability for 
reporters covering the briefing from NASA centers. NASA 
Television is broadcast on satellite GE-2, transponder 9C, at 
85 degrees West longitude, vertical polarization, frequency 
3880 MHz, audio of 6.8 MHz.
The briefing will also be webcast live via links at:
http://www.nasa.gov
-end-