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Giovanni Domenico Cassini
Giovanni Domenico Cassini (8 June 1625 – 14 September 1712) was an Italian mathematician, astronomer, astrologer and engineer. Cassini was born in Perinaldo,〔(【引用サイトリンク】url=http://messier.seds.org/xtra/Bios/cassini.html )〕〔(【引用サイトリンク】url=http://www.surveyor.in-berlin.de/himmel/Bios/Cassini-e.html )〕 near Imperia, at that time in the County of Nice, part of the Duchy of Savoy.〔Augusto De Ferrari (1978), ("Cassini, Giovan Domenico" ) ''Dizionario Biografico degli Italiani'' 21 (Rome: Istituto dell'Enciclopedia Italiana).〕 Cassini is known for his work in the fields of astronomy and engineering. Cassini most notably discovered four satellites of the planet Saturn and noted the division of the rings of Saturn (with the Cassini Division becoming named after him). Giovanni Domenico Cassini was also the first of his family to begin work on the project of creating a topographic map of France. Launched in 1997, the Cassini spaceprobe was named after him and became the fourth to visit Saturn and the first to orbit the planet.
==Life==
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