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Dying Supergiant Stars Implicated in Hours-long Gamma-Ray
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Dying Supergiant Stars Implicated in Hours-long Gamma-Ray Bursts

May 7, 2013
Astronomers suggest that blue supergiant stars may be the most likely sources of ultra-long GRBs. These stars hold about 20 times the sun's mass and may reach sizes 1,000 times larger than the sun, making them nearly wide enough to span Jupiter's orbit. Credit: NASA's Goddard Space Flight Center/S. Wiessinger