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[[File:Giovanni_Antonio_Magini.jpg|thumb|Giovanni Antonio Magini.]]'''Giovanni Antonio Magini''' (in Latin, Maginus) (13 June 1555 – 11 February 1617) was an Italian astronomer, astrologer, cartographer, and mathematician. | [[File:Giovanni_Antonio_Magini.jpg|thumb|Giovanni Antonio Magini.]]'''Giovanni Antonio Magini''' (in Latin, '''Maginus''') (13 June 1555 – 11 February 1617) was an Italian astronomer, astrologer, cartographer, and mathematician. | ||
Dedicating himself to astronomy, in 1582 he wrote ''Ephemerides coelestium motuum'', translated into Italian the following year. | Dedicating himself to astronomy, in 1582 he wrote ''Ephemerides coelestium motuum'', translated into Italian the following year. | ||
Revision as of 19:22, 27 May 2017
Giovanni Antonio Magini (in Latin, Maginus) (13 June 1555 – 11 February 1617) was an Italian astronomer, astrologer, cartographer, and mathematician.
Dedicating himself to astronomy, in 1582 he wrote Ephemerides coelestium motuum, translated into Italian the following year.
In 1588 he was chosen over Galileo Galilei to occupy the chair of mathematics at the University of Bologna after the death of Egnatio Danti.
Magini supported a geocentric system of the world, in preference to Copernicus's heliocentric system. Magini devised his own planetary theory, in preference to other existing ones. The Maginian System consisted of eleven rotating spheres, which he described in his Novæ cœlestium orbium theoricæ congruentes cum observationibus N. Copernici (Venice, 1589).
In his De Planis Triangulis (1592), he described the use of quadrants in surveying and astronomy. In 1592 Magini published Tabula tetragonica, and in 1606 devised extremely accurate trigonometric tables. He also worked on the geometry of the sphere and applications of trigonometry, for which he invented calculating devices. He also worked on the problem of mirrors and published on the theory of concave spherical mirrors.
He also published a commentary on Ptolemy’s Geographia.
As a cartographer, his life's work was the preparation of Italia or the Atlante geografico d'Italia (Geographic Atlas of Italy), printed posthumously by Magini's son in 1620.
He was a tutor in mathematics to the sons of Vincenzo I of Gonzaga, Duke of Mantua, a major patron of the arts and sciences. He also served as court astrologer.
He was also interested in pursuits which today would be considered pseudoscientific. A strong supporter of astrology, he defended its use in medicine in his De astrologica ratione (Venice, 1607). Magini collaborated closely with Valentine Naibod, and in this book he published De annui temporis mensura in Directionibus and De Directionibus from Naibod's unfinished manuscript Claudii Ptolemaei Quadripartitae Constructionis Apotelesmata Commentarius novus et Eiusdem Conversio nova. He was also interested in metoposcopy.
He corresponded with Tycho Brahe, Clavius, Abraham Ortelius, and Johann Kepler. His correspondence was edited in 1886 by Antonio Favaro.
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Nonfiction cross-reference
External links:
- Giovanni Antonio Magini @ Wikipedia
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