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Tuesday, November 10, 2009 |
Tuesday, November 10, 2009 |
Photo: Massive Cosmic Explosion Has Astronomers StumpedGamma-ray bursts are believed to precede the births of black holes and are generally thought to fall into two classes—long (two seconds or more) or short. Burst 060614, however, has mystified scientists by combining traits of both long and short gamma-ray bursts. Image by the Swift Team, courtesy NASA
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