The 2001 Swift Brochure

Catching Gamma-Ray Bursts on the Fly ... Gamma-ray bursts are distant explosions that represent the greatest release of energy the Universe has seen since the Big Bang. Satellites detect about one of these bursts a day, and scientists do not know what causes them. Now there is a satellite dedicated to addressing the gamma-ray burst mystery. Swift, a NASA mission with international participation, is planned for a 2003 launch. Swift will find hundreds of these powerful flashes of light each year.

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