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It all begins inside a star nursery with the formation of a massive star. The star then burns furiously using up all the fuel in its core in just a million years. It then collapses in on itself, becoming so dense a black hole is formed. It sucks in all the matter that once made up the star. Out of the black hole bursts the gamma ray jets. A hypernova is formed releasing gamma rays in two, tightly focussed beams. It means that every time we see a gamma ray burst we are witnessing the death cry of a massive star and the birth of a black hole.
