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Scientists have discovered a gamma ray explosion outside our galaxy that’s not only exceptionally powerful, but also long-lasting. Telescopes on Earth and in space — including Hubble — have teamed up to study the explosion of high-energy radiation first observed in July. Scientists said Tuesday that repeated bursts of gamma rays were detected over the course of a day. That’s highly unusual since these kinds of bursts normally last just minutes or even milliseconds as dying stars collapse or are torn apart by black holes. Scientists say such a long and recurrent gamma ray burst has never been seen before.
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