Sydney Leach

Sydney Leach FRS (11 April 1924—24 December 2019) was a British scientist based in France whose research areas included the fields ofspectroscopy, photophysics andphotochemistry. His work studying molecular ions led to new areas of interest, includingplanetary andatmospheric science, as well as the newly developing field ofastrobiology.^[1]

His scientific career was based in Paris, including his founding Directorship at Laboratoire de Photophysique Moléculaire Orsay, and his later move to L'Observatoire de Meudon where he was based for the remainder of his career.^[2]

Leach was elected Fellow of theRoyal Society in 1993.^[3]

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