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Pierre Janssen and Joseph Norman Lockyer, French and English astronomers, 1868

Pierre Janssen and Joseph Norman Lockyer, French and English astronomers, 1868


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Pierre Janssen and Joseph Norman Lockyer, French and English astronomers, 1868

Pierre Janssen and Joseph Norman Lockyer, French and English astronomers, 1868. Pierre Jules Cesar Janssen (1824-1907), left, and Joseph Norman Lockyer (1836-1920). In 1868 while making spectroscopic studies of solar prominences, working independently, both men observed a yellow line in the solar spectrum. Lockyer named it Helium from helios (sun). Obverse of a commemorative medal

Media ID 14866178

© Oxford Science Archive / Heritage-Images

Astronomer Commemorative Discovery Element Medal Medals Oxford Science Archive Scientist Solar Astronomy Spectroscopy


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