Template:Are You Sure/February 11

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Mathematician and geocentric astronomer Giovanni Antonio Magini was an ardent astrologer, defending its use in medicine in his De astrologica ratione (Venice, 1607).

• ... that astronomer, astrologer, cartographer, and mathematician Giovanni Antonio Magini devised his own geocentric planetary theory, and that the Maginian System consisted of eleven rotating spheres, which he described in his Novæ cœlestium orbium theoricæ congruentes cum observationibus N. Copernici (Venice, 1589)?