oh-my-god-particle

The Oh My God-Particle was detected over Dugway Park, Utah around 1991– probably a proton traveling at almost the speed of light (99.99%). It allegedly carried the same kinetic energy as a baseball traveling at 90 kmph. Most cosmic ray particles are of low energy and arise locally from solar flares. Another more energetic class of cosmic particles are thought to originate from elsewhere in the galaxy. They probably come from supernovae. Then there are extragalactic cosmic rays, which are of the Oh-My-God variety, with energy levels exceeding 1015 eV and rarely even 1020 eV are more formally known as ultra-high-energy cosmic rays. These particles travel very close to the speed of light and must have had a heck of a kick to attain such speeds. It is “proposed” that extragalactic cosmic rays are spun up in supermassive black holes. Furthermore, they estimate that nearly all extragalactic cosmic rays that reach Earth come from Centaurus A. It is unclear who or what sent these particles on course to earth.