Earth and sky, gamma ray image

Earth and sky, gamma ray image

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Credit: International Fermi Large Area Telescope Collaboration/DOE/NASA/SCIENCE PHOTO LIBRARY

Caption: Earth and sky, gamma ray image. Composite image from the Large Area Telescope of the Fermi Gamma-ray Space Telescope (FGST). Observations made when the Milky Way's galactic centre was near the zenith, directly overhead, are mapped to the centre of the image, forming a faint diagonal line. Gamma ray emissions from cosmic ray impacts with Earth's atmosphere form a ring. Combining the two observations forms an all-sky projection from Fermi's orbital perspective. The gamma ray intensity is colour-coded from low (blue) to high (yellow) on a logarithmic scale. The FGST was launched in June 2008. Image published in December 2013.

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Keywords: 2008, 2013, all sky, all-sky projection, astronomical, astronomy, astrophysical, astrophysics, black background, colour-coded, earth, emission, emissions, fermi gamma-ray space telescope, fgst, galactic centre, galaxy, gamma ray, gamma ray source, high intensity, large area telescope, lat, logarithmic, low intensity, milky way, nadir, no-one, nobody, planet, rays, sky, sources, space, space telescope, universe, zenith

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