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GIOVANNI DOMENICO See also:CASSINI (1625-1712) , the first of these, was See also:born at Perinaldo near See also:Nice on the 8th of See also:June 1625. Educated by the See also:Jesuits at See also:Genoa, he was nominated in 165o See also:professor of See also:astronomy in the university of See also:Bologna; he observed and wrote a See also:treatise on the See also:comet of 1652; was employed by the See also:senate of Bologna as See also:hydraulic engineer ; and appointed by See also:Pope See also:Alexander VII. inspector of fortifications in 1657, and subsequently director of waterways in the papal states. His determinations of the rotation-periods of See also:Jupiter, See also:Mars and See also:Venus in 1665–1667 enhanced his fame ; and See also:- LOUIS
- LOUIS (804–876)
- LOUIS (893–911)
- LOUIS, JOSEPH DOMINIQUE, BARON (1755-1837)
- LOUIS, or LEWIS (from the Frankish Chlodowich, Chlodwig, Latinized as Chlodowius, Lodhuwicus, Lodhuvicus, whence-in the Strassburg oath of 842-0. Fr. Lodhuwigs, then Chlovis, Loys and later Louis, whence Span. Luiz and—through the Angevin kings—Hungarian
Louis . XIV. applied for his services in 1669 at the stately See also:observatory then in course of erection at See also:Paris. The pope (See also:Clement IX.) reluctantly assented, on the understanding that the See also:appointment was to be temporary; but it proved to be irrevocable. Cassini was naturalized as a See also:French subject in 1673, having begun See also:work at the observatory in See also:September 1671. Between 1671 and 1684 he discovered four Saturnian satellites, and in 1675 the See also:division in See also:Saturn's See also:ring (see SATURN); made the earliest sustained observations of the zodiacal See also:light, and published, in See also:Les Elements de l'astronomie verifies (1684), an See also:account of See also:Jean Richer's (163o–1696) geodetical operations in See also:Cayenne. Certain See also:oval curves which he proposed to substitute for See also:Kepler's ellipses as the paths of the See also:planets were named after him Cassinians." He died at the Paris observatory on the I Ith of September 1712.
A partial autobiography See also:left by Giovanni Domenico Cassini was published by his See also:great-See also:grandson, See also:Count Cassini, in his Memoires pour servir d l'histoire See also:des sciences (181o). See also C. See also:Wolf, Histoirede l'observatoire de Paris (1902) ; Max. See also:Marie, Histoire des sciences, t. iv. p. 234; R. Wolf, Geschichte der Astronomic, p. 450, &c.
End of Article: GIOVANNI DOMENICO CASSINI (1625-1712)
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