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Pierre Janssen and Joseph Norman Lockyer, French and English astronomers, 1868. Artist: Unknown

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.
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Title:
Pierre Janssen and Joseph Norman Lockyer, French and English astronomers, 1868. Artist: Unknown
Caption:
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.
Credit:
Album / Oxford Science Archive / Heritage Images
Releases:
Model: No - Property: No
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Image size:
4204 x 4154 px | 50.0 MB
Print size:
35.6 x 35.2 cm | 14.0 x 13.8 in (300 dpi)
Keywords: