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Pierre Jules César Janssen (22 February 1824 – 23 December 1907), 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, but there is no justification for the conclusion that he deserves credit for the co ...
Pierre Janssen was a French astronomer who in 1868 discovered the chemical element helium and how to observe solar prominences without an eclipse. His work was independent of that of the Englishman Sir Joseph Norman Lockyer, who made the same discoveries at about the same time.
- The Editors of Encyclopaedia Britannica
Pierre Georges Cornil Jansen (28 February 1930 – 13 August 2015 at Saint-Pierre-Saint-Jean) was a French film scores composer. He was in particular the permanent collaborator of Claude Chabrol for whom he composed the music for many films.
Aug 18, 2022 · When watching the total eclipse on August 18, 1868 in Madras, British India, French astronomer Pierre Janssen discovered the new chemical element Helium. Janssen also is credited with discovering the gaseous nature of the solar chromosphere.
May 21, 2018 · Janssen, Pierre Jules César. (b. Paris, France, 22 February 1824; d. Meudon, France, 23 December 1907) physical astronomy, spectroscopy, photography. Janssen was born into a cultivated family. His father was a musician of Belgian descent, and his maternal grandfather was the architect Paul-Guillaume Le Moyne.
The French astronomer Pierre Janssen had already made his name in the field of the solar spectrum. He had invented a much-improved astronomical spectroscope with the instrument maker Ignazio Hofmann, although the two men quickly fell out bitterly about whose contribution was greatest.
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Pierre Jules César Janssen (22 February 1824 – 23 December 1907), also known as Jules Janssen, was a French astronomer inventor, and photographer 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.
