New answers tagged

4

There are very high energetic cosmic rays. The most energetic cosmic rays measured by the Auger observatorium for example have energies in excess of $10^{19}$ eV. They measure a few of those per year. At these energies they are no longer able to identify what type of particle it is, but it is believed to be predominantly protons and iron. These particles are ...


3

Cosmic microwave background radiation is very "cold", i.e. the average energy is very low. It started in the region of atomic levels, order of electron volts, but is now order of magnitude lower and the only interactions it can have with atoms in the atmosphere are elastic scatters. The origin of the CMB radiation at 380.000 years after the Big Bang is ...



Top 50 recent answers are included