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Donald Savage
Headquarters, Washington
(Phone: 202/358-1547)

Steve Roy
Marshall Space Flight Center, Ala.
(Phone: 256/544-0034)
March 30, 2004
NASA Announces Gravity Probe B Mission Press Briefing
NASA experts will discuss the Gravity Probe B (GP-B) launch, spacecraft, and mission objectives at 1 p.m. EST, Friday, April 2, in the Webb Auditorium, NASA Headquarters, 300 E. Street SW, Washington.

The briefing will cover the origins, experimental methods, technology, mission operations, and science of GP-B. The mission will test two important predictions of Albert Einstein's general theory of relativity. The 18-month mission is scheduled for launch Saturday, April 17, 2004, at 1:09 p.m. EST, from Vandenberg Air Force Base, Calif., on board a Boeing Delta II launch vehicle.

Briefing participants:
  • Anne Kinney, Director, Astronomy/Physics Division, NASA Headquarters

  • Rex Geveden, Program Manager, GP-B, and Deputy Director, NASA's Marshall Space Flight Center, Ala.

  • Francis Everitt, Principal Investigator, GP-B, Stanford University, Stanford, Calif.

  • Brad Parkinson, Co-Principal Investigator, GP-B, Stanford University

  • Kip Thorne, Feynman Professor of Theoretical Physics, California Institute of Technology, Pasadena, Calif.

NASA TV will carry the briefing live with two-way question-and-answer capability for reporters at participating NASA centers. NASA TV is available on AMC-9, transponder 9C, C-Band, located at 85 degrees west longitude. The frequency is 3880.0 MHz. Polarization is vertical, and audio is monaural at 6.80 MHz. Reporters can listen to the briefing by calling: 321/861-1200/1220/1240/1260. For more information about GP-B on the Internet, visit:


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