Pierre Jules César Janssen, aka Jules Janssen. 1824 - 1907. French astronomer.

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Pierre Jules César Janssen, aka Jules Janssen. 1824 - 1907. French astronomer. Both The Prix Jules Janssen and the Janssen Medal, which are awarded by the French Academy of Sciences, were named for him. From La Ilustracion Española y Americana, published 1892.

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Keywords: 19th, 20th, archival, archive, astronomer, century, cesar, france, french, historical, history, illustration, janssen, jules, medal, pierre, portrait, prix, science, scientist, ésar