César was born in 1714. He was the son of Jacques Cassini. Born in Thury-sous-Clermont, in the Oise department, the second son of Jacques Cassini and Suzanne Françoise Charpentier de Charmois. He was a grandson of Giovanni Domenico Cassini, and would become the father of Jean-Dominique Cassini, Comte de Cassini. In 1739, he became a member of the French Academy of Sciences in 1741 as an adjunct astronomer, and in 1745 as a full member astronomer. In January, 1751 he was elected a Fellow of the Royal Society.He succeeded to his father’s official position in 1756. He passed away in 1784. His chief works are: La méridienne de l’Observatoire Royal de Paris (1744), a correction of the Paris meridian; Description géométrique de la terre (1775); and Description géométrique de la France (1784), which was completed by his son ("Cassini IV").
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