Orr, M. A. (Mary Acworth) · London and Edinburgh, Gall and Inglis · leaf 175
e place inthe sidereal period of the planet. Thus Mars, as seenfrom Earth, which is near C the centre of the deferent,makes a great circle througli all the zodiac in twoyears, Jupiter in twelve, and so on. But meanv»hilethe epicycle is rotating round its own centre, Cl, andwhen the planet reaches… … Fig. 29. The Epicycle.Ptolemys method of accounting for movements such as those shown in Fig. 28,
Dante Alighieri, 1265-1321 · Astronomy, Ancient · Astronomy, Medieval · Early maps
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