In 1967, US satellites hunting secret nuclear tests detected a flash from deep space; the accidental signal became the first observed gamma-ray burst
[ad_1] Artist’s concept of a close-up naked-eye view of a GRB. Credit: NASA For more than half a century, gamma-ray bursts have remained one of the most puzzling events observed in space. These bursts are sudden flashes of gamma rays, a very high-energy form of light. They can appear from almost any direction in the…