GRB 101225A, Christmas Burst, 2 of 2, 2010

Bildnummer 12632187
GRB 101225A, Christmas Burst, 2 of 2, 2010
Gamma-ray bursts are the most luminous and mysterious explosions in the universe. The blasts emit surges of gamma rays as well as X-rays, and they produce afterglows that can be observed at optical and radio energies. On December 25, 2010, NASA's Swift spacecraft detected an unusually long-lasting gamma-ray burst in the constellation Andromeda. The event, nicknamed the Christmas burst, produced high-energy emission for at least two hours. Astronomers think the most likely sources of these ultra-long gamma-ray bursts are blue supergiant stars. These stars hold about 20 times the sun's mass and may reach sizes 1, 000 times larger than the sun. The star's collapse gives rise to powerful jets that propel matter at nearly the speed of light in opposite directions. As they interact with matter in and around the star, the jets produce a spike of gamma rays.
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Scott Wiessinger / GSFC / NASA
Bildgröße: 4950 px × 2784 px
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