Evershed, M. A. (Orr) · London : Gall & Inglis · leaf 500
^ Nearest Elarth. ^ Qu. vii. 4, 6, and xxiii. 52. { THE SPHERES AND THE ELEMENTS. 449 contemporaries. According to Alfraganus and Ptolemythe moons orb or sphere ^ was eccentric, but this wasnot the main cause of her varying distance from Earth.It was the revolution of her epicycle round its… … Fig. 52, The moons epicycle and deferent.(The dotted line represents the southern half of the deferent). often in the perigee of her epicycle when it was southas when it was north. But besides this, the deferent,being eccentric to Earth, had also a perigee and apogee;and Alfraganus says that the…
Dante Alighieri, 1265-1321 · Astronomy
Internet Archive · Pontifical Institute of Mediaeval Studies Library · Public Domain Mark 1.0. Free to use for anything.
