Gamma Ray Burster

Gamma Ray Burster
Gamma ray bursts were first detected by U. S. military Vela satellites launched in 1963 to monitor Soviet compliance with the nuclear test ban treaty.

In 1995 a debate was held at the National Academy of Sciences on the nature of the Gamma Ray Bursters. Virginia Trimble wrote an entertaining and elightening review paper on the Curtis-Shapley Debate on the existence of external galaxies.

Perhaps they come from outside the Galaxy, from active galactic nuclei, quasars or gamma ray bursters.

Gamma ray bursters segment of Science Friday, 3 June 2005 (RealAudio)
Most distant cosmic blast sighted (BBC reports a registered GRB from about 13 billion light years away)
Cosmological Gamma-Ray Bursts and Hypernovae Conclusively Linked (ESO) ...

See also: Redshift, Gamma ray, Burster, Ray, Distance