Gamma ray bursts travel at the speed of light: https://en.wikipedia.org/wiki/Gamma-ray_burst#WR_104:_A_nearby_GRB_candidate https://en.wikipedia.org/wiki/Gamma-

Gamma ray bursts travel at the speed of light: https://en.wikipedia.org/wiki/Gamma-ray_burst#WR_104:_A_nearby_GRB_candidate https://en.wikipedia.org/wiki/Gamma-ray_burst#WR_104:_A_near...