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Episode 165: Brightest Explosion Ever Seen

Play Jun 5•4:23

NASA's SWIFT telescope monitors the sky for emission from powerful outbursts. On March 19, 2008, it glimpsed an explosion so bright it could be seen with the naked eye for 30 seconds despite being 7.5 billion light years away -- the farthest object ever seen with human eyes. It was a gamma ray burst, one of the incredible explosions credited to the explosions of tremendously massive stars. ...

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