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NASAs Fermi Space Telescope Explores New Energy Extremes
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NASA's Fermi Space Telescope Explores New Energy Extremes

January 11, 2013
This all-sky Fermi view includes only sources with energies greater than 10 GeV. From some of these sources, Fermi's LAT detects only one gamma-ray photon every four months. Brighter colors indicate brighter gamma-ray sources. Credit: NASA/DOE/Fermi LAT Collaboration