Jacques Cassini
See also: Cassini
Jacques Cassini , known as Cassini II , born with Paris the February 18th 1677 and died in Thury the April 16th 1756 of the continuations of an car accident, is a French astronomer.
Biography
He is the son of Jean-Dominique Cassini and Genevève de Laistre. Raised by his father, he studies with the Observatoire of Paris (where, one says, he would have been born) before even entering to the college Mazarin. He becomes pupil astronomer with the Academy of Science in 1694, then he succeeds his father as a boarder of the Academy in 1712.With his father, he travels much and takes part in many astronomical or geodetic operations. Admitted with the Royal Society, in 1696, and to the Academy of Berlin, it binds friendship with Newton and Halley. Cartesian militant, it gives an opinion against the theory of terrestrial flatness. In 1740, it gives up its activity of scientist gradually and lets his son César-François take again the family torch. He entrusts to him the load of the Observatoire and the establishment of the chart of France.
Jacques Cassini in addition sees himself entrusting important administrative loads: ordinary Master of the Room of the accounts, then Magistrate with the room of justice and to advise State.
It described a perpendicular with the Méridienne of France and provides several Mémoires to the Academy, inter alia a great work on the slope of the satellites and the Saturn's ring. He is the author of several other works, among which Éléments of astronomy (1740) and Of the size and figure of the ground (1720).
The asteroid (24102) Jacquescassini was named in its honor.
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