Fermi’s 12-year View of the Gamma-ray Sky

This image shows the entire sky as seen by NASA's Fermi Gamma-ray Space Telescope's Large Area Telescope. The most prominent feature is the bright, diffuse glow running along the middle of the map, which marks the central plane of our Milky Way galaxy. The image was constructed from 12 years of observations using front-converting gamma rays with energies greater than 1 GeV.