The GLAST (Fermi) Spacecraft in Orbit

  • Released Friday, September 14th, 2007
  • Updated Wednesday, November 15th, 2023 at 12:23AM
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GLAST will be launched into a circular orbit around the Earth at an altitude of about 560 km (350 miles). At that altitude, the observatory will circle Earth every 90 minutes. In sky-survey mode, GLAST will be able to view the entire sky in just two orbits, or about 3 hours. Because gamma rays in the GLAST's energy band are unable to penetrate the Earth's atmostphere, it is essential that GLAST perform its observations from space.

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NASA/Goddard Space Flight Center Conceptual Image Lab


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