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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