Discovered in 1967 by Vela spy satellites searching for nuclear tests, a few hundred are seen per year.  
Discovered in 1967 by Vela spy satellites searching for nuclear tests, a few hundred are seen per year.  The Compton Observatory and BeppoSAX satellite probed their origins, and in 1999 Michigan's Carl Akerlof detected a visible light afterglow of, for ten points, what cosmological explosions known for their signature type of electromagnetic radiation, colloquially called GRBs?
Discovered in 1967 by Vela spy satellites searching for nuclear tests, a few hundred are seen per year.  
Gamma Ray Bursts (accept GRBs before it's given)