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发帖数: 375 | 1 Mystery flashes unveiled.
Gamma ray bursts--cosmic explosions that emit more power in a few seconds than
the sun does in 10 billion years--have posed a mystery for more than 30 years.
But since 1997, astronomers have employed an armada of ground-based telescopes
to make rapid follow-up observations of the bursts' feeble afterglows. As a
result, researchers now seem to be closing in on the true nature of the massive
blasts: At least some are apparently the birth cries of black holes, formed
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