US satellites hunting nuclear tests accidentally found first gamma-ray burst

 Gamma-ray bursts are among the most powerful explosions observed in the universe. First accidentally detected by Vela satellites in 1967, they puzzled scientists for decades. Research later showed that these bursts come from distant cosmic events, including massive stars collapsing and neutron star mergers. Yet their powerful jets still hold mysteries. Gamma-ray bursts are among the most powerful explosions observed in the universe. First accidentally detected by Vela satellites in 1967, they puzzled scientists for decades. Research later showed that these bursts come from distant cosmic events, including massive stars collapsing and neutron star mergers. Yet their powerful jets still hold mysteries.