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Pierre Janssen

French astronomer (1824-1907) · France · On the map · Scientists · Died at 83

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.

Pierre Janssen is read about 53 times a day, in 47 languages.

A typical day, 30 days to 6 November 2026

The middle day of the days counted, so one week of news cannot move it. The line under it is the last 104 days, one point a day.

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A life in dates

1907Died23 December 19071893Commander of the Legion of HonourAward1876Rumford MedalAward1875Foreign Member of the Royal SocietyAward1868Knight of the Legion of HonourAwardLalande PrizeAward1824Born22 February 1824

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Awards

Commander of the Legion of Honour1893
Rumford Medal1876
Foreign Member of the Royal Society1875
Knight of the Legion of Honour1868
Lalande Prize1868
Honorary Fellow of the Royal Society of Edinburgh
Military Order of Saint James of the Sword

About this person

Country
France
Category
Scientists
Type
Scientist
Status
Deceased
Dates
Lived 1824 to 1907 · aged 83

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