Assertion: cosmic ray | /r/HasProperty | extraterrestrial origin
Facets:
value: by victor f. hess
type: OTHER
Source sentences:
text: Cosmic rays were first found to be of extraterrestrial origin by Victor F. Hess (c.1912) when he recorded them with electrometers carried to high altitudes in balloons, an achievement for which he won the Nobel Prize in 1936.