Evershed, M. A. (Orr) · London : Gall & Inglis · leaf 174
inthe sidereal period of the planet. Thus Mars, as seenfrom Earth, which is near C the centre of the deferent,makes a great circle through all the zodiac in twoyears, Jupiter in twelve, and so on. But meanvrhilethe epicycle is rotating round its own centre, Cl, andwhen the planet reaches the point… … Fig. 29. The Epicycle.Ptolemys method of accounting for movements such as those shown in Fig. 28,
Dante Alighieri, 1265-1321 · Astronomy
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