Fermi Detects Gamma-ray Puzzle from M31 (VIDEO)

NASA/Goddard Space Flight Center

Caption

NASA's Fermi telescope has detected a gamma-ray excess at the center of the Andromeda galaxy that's similar to a signature Fermi previously detected at the center of our own Milky Way. Watch to learn more.

Credit

NASA's Goddard Space Flight Center/Scott Wiessinger, producer

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