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Pierre Janssen
Pierre Jules César Janssen, usually known in French as Jules Janssen, was a French astronomer who, along with the English scientist Joseph Norman Lockyer, is credited with discovering the gas helium.
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Honorary Fellows of the Royal Society of Edinburgh
Discoverers of chemical elements
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19th-century astronomers
French astronomers
Burials at Père Lachaise Cemetery
Foreign Members of the Royal Society
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