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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
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