Cocooned, dying stars may cause sudden, bright blasts that confound scientists

Extremely fast cosmic explosions puzzling scientists may be outbursts arising from dying stars, new research suggests.

Dubbed fast blue optical transients (FBOTs), because of their “blue” heat and very rapid evolution, only a handful of these outbursts have been recorded. (Astronomers often give them evocative nicknames, like “the Camel” or “the Koala.”)

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