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P.J.C. Janssen
Directing
22 Feb 1824
† 23 Dec 1907
France
Biography
Pierre Jules César Janssen, also known as Jules Janssen, was a French astronomer who, along with the English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium. Pierre Janssen studied mathematics and physics at the faculty of sciences. He taught at the Lycée Charlemagne in 1853, and in the school of architecture 1865 – 1871, but his energies were mainly devoted to various scientific missions ...
Also Known As
Jules Jenssen, Pierre Janssen, Pierre Jules César Janssen
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