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Fermi

Published by National Aeronautics and Space Administration | National Aeronautics and Space Administration | Metadata Last Checked: February 14, 2026 | Last Modified: 2025-04-23
Fermi is a powerful space observatory that will open a wide window on the universe. Gamma rays are the highest-energy form of light, and the gamma-ray sky is spectacularly different from the one we perceive with own eyes. With a huge leap in all key capabilities, Fermi data will enable scientists to answer persistent questions across a broad range of topics, including supermassive black-hole systems, pulsars, the origin of cosmic rays, and searches for signals of new physics.

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