Kavel 1116
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ASTRONOMY -- CLAVIUS, Chr. In sphaeram loannis de Sacro Bosco commentarius. Nunc quinto ab ipso auctore hoc anno 1606 recognitus, & plerisque in locis locupletatus. Lyon, Ex Off. Q.H. a Porta, sumpt. Io. de Gabiano, 1607. (8), 639, (1), (22) pp., (1 blank leaf). W. ti. printed in red & black, large ti-woodcut of a sphere & num. woodcuts in the text. Cont. vellum w. overl. sides. (Faint stain on ti., outer margin 2 lvs. a bit frayed, sl. age-toned).
Christophorus Clavius (1538–1612) was a German Jesuit mathematician and astronomer, best known as the main architect of the Gregorian calendar (1582). Clavius’ commentary, first published in 1570, became a standard astronomy textbook in Europe, with at least 16 editions by 1618. It expanded on Sacrobosco’s geocentric model, integrated mathematical rigor, and addressed contemporary astronomical debates—though it notably avoided endorsing Copernicus’ heliocentric system. - Houzeau-Lancaster I, 2678.€ 300
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