The Oh-My-God-Particle
The Oh-My-God particle was an ultra-high-energy cosmic ray (most likely a proton) detected on the evening of 15 October 1991 over Dugway Proving Ground, in Utah. The particle was 20 million times more energetic than the highest energy measured in radiation emitted by an extragalactic object – in other words, this subatomic particle had the energy of […]