Pierre Janssen
(1824-1907)
French astronomer
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Pierre Jules César Janssen (22 February 1824 – 23 December 1907), also 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.
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| Born |
22 February 1824 Paris, France
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| Died |
23 December 1907 (aged 83) Meudon, France
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| Zodiac | Pisces |
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