Orr, M. A. (Mary Acworth) · London and Edinburgh, Gall and Inglis · leaf 105
Fig. 16. The System of Philolaus : night on earth. Only the side turned away from the centre is inhabited: consequently the CentralFire and Antichthon are invisible. … Fig. 17. Twelve hours later : day on earth. Earth has made half a revolution and her outer side is now lighted by the sun, which has only moved about half a degree forward in its yearly orbit. Antichthon has also made half a revolution, therefore remains invisible. 74 PYTHAGORAS AND HIS FOLLOWERS.…
Dante Alighieri, 1265-1321 · Astronomy, Ancient · Astronomy, Medieval · Early maps
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
