Dolores Beasley Headquarters, Washington, DC March 20, 2000 (Phone: 202/358-1753) Nancy Neal Goddard Space Flight Center, Greenbelt, MD (Phone: 301/286-0039) NOTE TO EDITORS: N00-8 SPACE SCIENCE UPDATE ON MYSTERIOUS GAMMA-RAY DISCOVERY MARCH 22 A mystery surrounding previously unidentified gamma-ray sources found in our own galaxy, the Milky Way, is the subject of a Space Science Update at 1 p.m. EST Wednesday, March 22, at the James E. Webb Auditorium at NASA Headquarters, 300 E St., SW, Washington, DC. The discovery of these puzzling objects and speculation on their characteristics will be discussed in the March 23 issue of Nature magazine. The findings are from NASA's Compton Gamma Ray Observatory (CGRO) spacecraft. The Space Science Update panelists will be: * Dr. Donald Kniffen, CGRO deputy program scientist, NASA Headquarters * Dr. Neil Gehrels, CGRO project scientist, NASA Goddard Space Flight Center, Greenbelt, MD * Dr. Isabelle Grenier, Professor, astroparticle physics, University of Paris VII, Commission of Atomic Energy, Saclay, France * Dr. Lynn Cominsky, Professor, physics and astronomy, Sonoma State University, CA The event will be carried live on NASA Television with question-and-answer capability for reporters covering the briefing from participating 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. -end-