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Joined 2026-09-21 Message
Incoming links: Telescope
Léon Foucault 2026-10-18
A physicist appointed to the Paris Observatory in 1855 who developed telescopes.[ref]
Léon Foucault à l’Observatoire by Observatoire de Paris. Léon Foucault à l’Observatoire, p. 2: appointed physicist in 1855; telescope development
Portrait of Jean Bernard Léon Foucault
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