RECORD BLAST. NASA’s Fermi Gamma-ray Space Telescope spied the highest-energy light ever seen from a gamma-ray burst (GRB) on April 27, 2013. This image compares the sky in high-energy gamma rays during a three-hour interval prior to the event (left) with a three-hour interval between 2.5 hours before the blast and 30 minutes of the blast, called GRB 130427A.