Art Resource - AR926631

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Medal commemorating Pierre Janssen and 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.

Unique Identifier AR926631

Type Image

Purpose Public

Size 4204px × 4154px

Photo Credit HIP / Art Resource, NY

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