This all-sky image, constructed from two years of observations by NASA's Fermi Gamma-ray Space Telescope, shows how the sky appears in gamma-ray light. Brighter colors indicate brighter gamma-ray ... more 
This all-sky image, constructed from two years of observations by NASA's Fermi Gamma-ray Space Telescope, shows how the sky appears in gamma-ray light. Brighter colors indicate brighter gamma-ray sources. A diffuse glow fills the sky and is bri less 
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SPACE.com | Photo By NASA/DOE/Fermi LAT Collaboration)
Tue, Jun 4, 2013 10:10 AM EDT