Timeline of other background radiation fields

Timeline of other background radiation fields

Timeline of other background radiation fields

* 1912 - Victor Hess discovers that the ionization of air increases with altitude indicating the existence of cosmic radiation
* 1949 - Herbert Friedman detects evidence for extrasolar X-rays
* 1962 - Riccardo Giacconi, Herbert Gursky, F. Paolini, and Bruno Rossi formally discover the X-ray background


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