Astronomers have long sought the launch sites for some of the highest energy protons in our galaxy. Now, a study using 12 years of data from NASA’s Fermi Gamma-ray Space Telescope (Fermi) confirms that a remnant of a supernova, or star explosion, is just such a place, solving a decade-long cosmic mystery. Previously, Fermi has [...]
Read the full article at: https://wipac.wisc.edu/study-led-by-uw-madison-researcher-confirms-star-wreck-as-source-of-extreme-cosmic-particles/