Jean-Baptiste Joseph Delambre (1749–1822)
Born 1749 CE, died 1822 CE.
Jean Baptiste Joseph, chevalier Delambre (19 September 1749 – 19 August 1822) was a French mathematician, astronomer, historian of astronomy, and geodesist. He was also director of the Paris Observatory, and author of well-known books on the history of astronomy from ancient times to the 18th century. He is known for his expedition to gather geodetical measurements in order to define the metre.
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