Astronomy Picture of the Day

Two distant galaxies which formed about 2 billion years after the big bang are caught in the afterglow of GRB090323, a gamma-ray burst seen across the Universe. Shining through its own host galaxy and another nearby galaxy, the alignment of gamma-ray burst and galaxies was inferred from the afterglow spectrum following the burst's initial detection by the Fermi Gamma Ray Space TelescopeCaught in the Afterglow Illustration Credit: ESO, L. Calçada - Research Team: Sandra Savaglio (MPE) et ... Full Story