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Some of those enormous stars end their lives in hypernovas, sometimes called super-supernovas, Longmore said, releasing more than 10 times the energy of a normal supernova. Those colossal star explosions usually collapse into black holes and are thought to produce long gamma-ray bursts, the universe's most powerful explosions.
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117 people meet this criteria. And the impact is dramatic:，更多细节参见PDF资料