Fermi Gamma-ray Space Telescope

Fermi is illustrated in multiple shades of blue. With two "wings" coming out of its sides, each with three panels of solar arrays, the main body of the spacecraft is box-shaped. It has a main body with one open side with small components visible within and a smaller, darker box on top.
December 20, 2022
Historical DateDecember 20, 2022
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An illustration of NASA's Fermi spacecraft. The colors depicted in this illustration are for artistic purposes only.

Fermi observes gamma rays, the most energetic type of light, from extreme cosmic phenomena including gamma-ray bursts, active galaxies, supernova remnants, pulsars, and more. The mission has improved our understanding of dark matter and discovered the Fermi bubbles, two previously unknown massive structures extending above and below the plane of our galaxy, the Milky Way.

Launched: June 11, 2008