Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 162
ide plain, and often a deep cavern or crater,1 isbeheld encircled by a chain of mountains like a ring.These latter in many instances rise to a great altitude;and frequently from the middle of the enclosed plain alofty insulated peak shoots far up into the sky. 286. Impossible as it may appear, the… … the position of the sun, E that of the earth, and M the moonin her first quarter, the hemisphere OD which is turned tothe sun being enlightened, and the other CP being dark.CL is a lunar mountain, the top of which is illumined bythe light of the sun, coming in the direction of the raySOL; and this…
Astronomy
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