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Nasa's Fermi Satellite Kicks Off a Blazar-Detecting Bonanza
Black-hole-powered galaxies called blazars are the most common sources detected by NASA's Fermi Gamma-ray Space Telescope. As matter falls toward the supermassive black hole at the galaxy's center, some of it is accelerated outward at nearly the speed of
Credit: M. Weiss/CfA
A long time ago in a galaxy half the universe away, a flood of high-energy gamma rays began its journey to Earth.
From NASA
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