well, if you want more:
Most cosmic rays originate from extrasolar sources within our own galaxy such as rotating neutron stars, supernovae, and black holes. However, the fact that some cosmic rays have extremely high energies provides evidence that at least some must be of extra-galactic origin (e.g. radio galaxies and quasars); the local galactic magnetic field would not be able to contain particles with such a high energy. The origin of cosmic rays with energies up to 1014 eV can be accounted for in terms of shock-wave acceleration in supernova shells. The origin of cosmic rays with energy greater than 1014 eV remained unknown until recently, when a large collaborative experiment at the Pierre Auger Observatory appears to have answered this question. In preliminary results announced in November, 2007 they showed a strong correlation between their 27 most energetic events and active galactic nuclei [AGN]. These results demonstrated that there is only a small chance (less than 1/100) that the highest energy protons originated from outside the AGN.
Cosmic radiation is only 15% of radiation on the planet's surface, there's a lot more coming from the earth's crust, radon (naturally existing, radioactive gas) and emissions of burning fossil fuels. Most europeans will still see a tiny bit of Chernobyl on their tv's aswell