Re: What is that
If only we knew.
A GRB is the most energetic event known in the universe outside of the Big Bang.
It MAY be a special type of Supernova exploding star and it may not. A GRB could sterilize an entire galaxy or a local group of galaxies were its energy radiated in all directions. Fortunately, recent evidence says that it's NOT omnidirectional, instead a beam of energy, gamma rays then particles is emitted. Like a flashlight beam it's narrow. Just don't be in the way. One of these may go off in the local group of galaxies every say 200 million years. It's OK as long as you're not in the beam's path.