Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 259
s,while Theophilus is 64 miles in diameter and 19,000 feet deep.The lofty peak in the great crater Copernicus towers 11,000feet above the plains from which it rises. Some of thesecraters are on such an enormous scale that their rims wouldnot be visible from their centers because of the curvature… … Fig. 78. — The great crater Clavius with smaller craters on its rimand in its interior. Photographed by Ritchey with the 4.0-inch telescopeof the Yerkes Observatory. CH. VII, 136] THE MOON 213 volcanic origin, the activity which was present on the moonenormously surpassed anything now known on the…
Astronomy
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