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About Pierre Janssen
Pierre Jules César Janssen, usually known as Jules Janssen, was a French astronomer who, along with English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium.
Everything about Pierre Janssen →- Occupation
- astronomer, photographer, physicist, geologist
- Position held
- president, chairperson, president of the French Academy of Sciences
- Citizenship
- France
- Born
- February 22, 1824
- Died
- December 23, 1907