GRB 090429B is a gamma-ray burst (GRB) that was detected on April 29, 2009. It is one of the most distant and energetic GRBs observed, occurring approximately 4.2 billion light-years away from Earth. This burst is categorized as a long-duration gamma-ray burst, which typically lasts from a couple of seconds to several minutes and is believed to be associated with the collapse of massive stars.
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