Supernova 'alert system' could warn us of dying stars about to explode
At the end of their lives red supergiant stars explode in massive supernova blasts. Rapid dimming caused by a shroud of dense material could warn astronomers this violent event is about to occur.
TroibNews 
At the end of their lives red supergiant stars explode in massive supernova blasts. Rapid dimming caused by a shroud of dense material could warn astronomers this violent event is about to occur.
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