View Full Version : Astronomy Without A Telescope Oh-My-God Particles

2011-Jun-12, 12:40 AM
Cosmic rays are really sub-atomic particles, being mainly protons (hydrogen nuclei) and occasionally helium or heavier atomic nuclei and very occasionally electrons. Cosmic ray particles are very energetic as a result of them having a substantial velocity and hence a substantial momentum. The Oh-My-God particle detected over Utah in 1991 was probably a proton traveling [...]

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