NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Gamma ray burst formation. Image 4 of 5. Computer artwork of the core of a massive star soon after the inner core (centre) collapsed to form a black hole in a gamma ray burst (GRB) event. The black hole is ejecting the surrounding material as jets (white) from the poles of the black hole towards the star's surface. This is the collapsar theory of GRBs. It says the spin or magnetic field of the black hole forms these jets that are the source of the gamma rays of the GRB, a massive short-lived burst of energy that is 100s of times brighter than an ordinary supernova. For GRB formation, see images R670/148-152.
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