A physicist.[ref]
https://www.oeaw.ac.at/gedenkbuch/personen/a-h/victor-hess/. Independent biographical identity and professional specialization
The Hess cosmic-ray balloon experiment examines how measured air ionization changes with altitude. Inferring an extraterrestrial source requires separating that signal from the detector response and from radiation associated with the ground.
Portrait of Victor Hess
. Anonymous photographer; Nobel Foundation / NobelPrize.org source. Public domain claims for EU anonymous-work expiration and United States nonrenewal, as documented on the File. Source usage terms, via Wikimedia Commons. Source.
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