Remove my ignorance with some pertinent facts, please.
Sorry FARS.
A gamma burster is a star which when it goes nova showers gamma rays out light years sterilizing any life. One is either just blow but we have not seen it blow (due to distance) or will shortly blow — it is about 1500 LY from us. Is a thread here some where about this. If the gamma rays reach this far we are toast... literally... plus if gamma is of sufficient intensity, it could vaporize all star systems within its path...