Janssen, Jules, 1824-1907
Astrophysicist, member of the AcadeĢmie des Sciences and the Bureau des Longitudes, founded the Physical Astronomy Observatory of Meudon, France. His work was mainly concerned with the application of spectroscopy and photography in astronomy.
From the description of Biographical files, 1863-1920. (Unknown). WorldCat record id: 83103742
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