Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 239
he illuminatedportion of the moon asseen from the earth plusthe illuminated portion ofthe earth as seen from themoon always equals 180°.When the moon is nearlynew, and, consequently,the earth nearly full asseen from the moon, thedark side of the moon issomewhat illuminated by simlight reflected… … Fig. 68. — The moon partially illu-minated by light reflected from theearth. Photographed by Barnard atthe Yerkes Observatory.
Astronomy
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