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伽瑪射線暴(英文:Gamma-ray burst,縮寫GRB,又叫伽瑪暴),係來自遙遠星系、能量極高嘅爆炸光芒。伽瑪射線暴係宇宙之中由大爆炸以嚟能量同光度都最高嘅電磁脈衝。[1]爆發可以持續十毫秒至數個鐘。[2][3][4]最初嘅伽瑪射線閃光之後,仲會留低時間更長、波長更長嘅「餘輝」(X光、紫外光、可見光、紅外光、微波、無線電波)。[5]
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