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Mysterious bright blue cosmic blasts triggered by black holes shredding stars, scientists say. 'It's definitely not just an exploding star.'

"The sheer amount of radiated energy from these bursts is so large that you can't power them with a core collapse stellar ...
Live Science

First-ever 'superkilonova' double star explosion puzzles astronomers

A double explosion, in which a dying star split, then recombined, may be a long-hypothesized but never-before-seen "superkilonova." ...