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Erica Hupp/Dwayne Brown
Headquarters, Washington

Ray Villard
Space Telescope Science Institute, Baltimore

Nov. 13, 2006
NASA Schedules Dark Energy Discovery Media Teleconference
NASA will host a media teleconference with Hubble Space Telescope astronomers at 1 p.m. EST Thursday, Nov. 16, to announce the discovery that dark energy has been an ever-present constituent of space for most of the universe's history.

Reporters must call Ray Villard at the Space Telescope Science Institute Press Office, Baltimore, at: 410-338-4514 ( or Cheryl Gundy at 410-338-4707 ( for participation information. Images and graphics about the research will be posted shortly before the start of the briefing at:

Briefing participants:
-- Adam Riess, astrophysicist, Space Telescope Science Institute and Johns Hopkins University, Baltimore
-- Mario Livio, senior astrophysicist, Space Telescope Science Institute
-- Louis-Gregory Strolger, astronomer, Western Kentucky University, Bowling Green, Ky.
-- Sean Carroll, senior research associate, California Institute of Technology, Pasadena, Calif.

Audio of the event will be available on the Internet at:

For NASA TV streaming video, schedule and downlink information, visit:

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