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Henri A. Deslandres: The Sixteenth Bruce Medalist

Henri Deslandres was a six-year-old Parisian schoolboy when Gustav Kirchoff and Robert Bunsen in Heidelberg discovered that each gas emitted and absorbed its own characteristic set of wavelengths. A number of scientist, including Kirchoff himself, Norman Lockyear in England, and Jules Janssen in France, immediately set out to determine the composition of the Sun, while William Huggins in England attempted the difficult spectroscopic study of more distant stars.

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