Last updated on April 16, 2014 at 21:24 EDT
NASAs Fermi Celebrates Five Years in Space Enters Extended
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NASA's Fermi Celebrates Five Years in Space, Enters Extended Mission

August 23, 2013
This view shows the entire sky at energies greater than 1 GeV based on five years of data from the LAT instrument on NASA's Fermi Gamma-ray Space Telescope. Brighter colors indicate brighter gamma-ray sources. Image Credit: NASA/DOE/Fermi LAT Collaboration