NASA's Fermi Satellite Celebrates 10 Years of Discoveries

The Fermi Gamma Ray Space Telescope, launched in 2008, has significantly advanced our understanding of the universe. It has mapped the sky in gamma rays and made transformative discoveries, including the first detection of light and gravitational waves from the same source, confirming Einstein's theory of light speed consistency, and identifying cosmic structures like the Milky Way bubbles. Fermi has also studied cosmic rays from supernovae and observed terrestrial gamma ray flashes linked to lightning. These findings have reshaped our view of the cosmos.

What challenges did scientists face in finding the source of cosmic rays?

What impact has Fermi's first ten years had on our understanding of the universe?