Evershed, M. A. (Orr) · London : Gall & Inglis · leaf 139
sured, by pointing the astrolabefirst to sun and then to moon, the third angle, at thesun, may be computed, and then the ratio sun-earthto moon-earth will be known. The method is perfecttheoretically, and if the sun were comparatively near,say about ten times the moons distance, it would… … Fig. 20. Method of Aristarchus for finding the distance of the sun. impossible to determine from looking at the moonthe exact time when the division between light anddark is a straight line. Aristarchus made the angleat Earth 87° instead of 89° 50, and this gave the suna distance of about 19 times…
Dante Alighieri, 1265-1321 · Astronomy
Internet Archive · Pontifical Institute of Mediaeval Studies Library · Public Domain Mark 1.0. Free to use for anything.
