César-François Cassini

See also: Cassini

César-François Cassini , known as Cassini III or Cassini de Thury , born with Thury-under-Clermont the June 17th 1714 and died of the Variola to Paris the September 4th 1784, is a French astronomer.

Biography

He is the second wire of Jacques Cassini and Suzanne Francoise Charpentier of Charmois. Raised by its great-uncle Jacques-Philippe Maraldi, it very early shows gifts for the Astronomie. Its scientific career begins at the time of the debate of the Cartésien S against the Newtonien S, concerning the form of the Ground. It enters to the Academy of Science like assistant supernumerary astronomer in 1735, assistant astronomer in 1741, then boarder astronomer in 1745.

He marries in 1747 Charlotte Drouin de Vandeuil, of which he has two children, Jean-Dominique (Cassini IV), who will succeed to him the Observatory, and Francoise Elisabeth. He is in addition ordinary Master with the Chambre of the accounts and adviser of the king, foreign member of the Royal Society and the Académie of Berlin.

Like all Cassini, he lives the same apartment of the first stage of the Observatoire of Paris and obtains that this right becomes hereditary.

Its astronomical work did not remain in the history of sciences. Cassini III was before a whole cartographer of great talent. Its chart of France is one of traditional kind. It corrected the Méridienne which passes by the Observatory and was in charge of the geometrical description of France. The fruit of its work was this beautiful chart of France, made up of 180 sheets, which was published in the name of the Academy of Science of 1744 with 1793, and which offered the most faithful representation of the country, on a scale of a line for 100 measuring apparatuses. César Cassini which has not been able to complete this vast company, his/her son Jean-Dominique Cassini was charged to finish it.

Iconography

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