The Oh-My-God particle

The Oh-My-God particle was an ultra-high-energy cosmic ray detected on 15 October 1991 by the Fly’s Eye camera in Dugway Proving Ground, Utah, U.S. At that time it was the highest-energy cosmic ray that had ever been observed. At that time it was the highest-energy cosmic ray that had ever been observed. Although higher energy cosmic rays have been detected since then, this particle’s energy was unexpected, and called into question theories of that era about the origin and propagation of cosmic rays. Read More HERE