GRB_100621A
GRB 100621A
June 2010 Gamma-ray burst in the constellation Indus
GRB 100621A was a gamma-ray burst observed on June 21, 2010, by the Swift spacecraft.[1][2] It is the second brightest gamma-ray burst yet observed, after GRB 130427A.[3] The distance is reported to be approximately five billion light years, far outside our own Milky Way Galaxy.