Time in Italy
Cassini was the son of Jacopo Cassini, a Tuscan, and Giulia Crovesi. In 1648 Cassini accepted a position at the observatory at Panzano, near Bologna, to work with Marquis

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Cassini observed and published surface markings on Mars (earlier seen by Christiaan Huygensbut not published), determined the rotation

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Attracted to the heavens in his youth, his first interest was in astrology. While young he read widely on the subject of astrology, and soon was very

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In 1653, Cassini, wishing to employ the use of a meridian line, sketched a plan for a new and larger meridian line but one that would be difficult to build. His calculations were precise; the construction succeeded perfectly; and its success gave Cassini a brilliant reputation for

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• 24101 Cassini, an asteroid
• Aerial telescope – large telescopes used by Cassini

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• Dominique, comte de Cassini, Giovanni Dominico Cassini biography
• Barkin, Iu. V. (1978). "On Cassini's laws". Astronomicheskii Zhurnal.

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• Specimen observationum Bononiensium (in Latin). Bologna: eredi Evangelista Dozza (1.). 1656.
• Martis circa axem proprium revolubilis observationes Bononiae habitae

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