Evershed, M. A. (Orr) · London : Gall & Inglis · leaf 188
epicycles anddeferents, and the directions of the several movements,but epicycles and spaces between deferents are all mad**equal. It will be noted that the sun has no epicycleand that the moon turns on hers in a reverse directionthat the centres of those of Mercury and Venus are ina line with the… … 30,000 years. 29^ years. nearly 12 years. nearly 2 years. One siderealyear. One siderealyear. One siderealyear. One siderealmonth (27^ dys.) Fig. 35. The Ptolemaic system. The arcs of circles are portions of the deferents which carry round the smaller circles(the epicycles) in th^ periods named at…
Dante Alighieri, 1265-1321 · Astronomy
Internet Archive · Pontifical Institute of Mediaeval Studies Library · Public Domain Mark 1.0. Free to use for anything.
