Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 106
ofthe earth. 90. Apparent Size of the Moon on the Horizon and inthe Zenith. — The moon is nearly four thousand miles far-ther from the observer when she is on the horizon thanwhen she is in the zenith. This is evident from Fig. 106.C is the centre of the earth, M the moon on the hori-zon, M the… … Fig. 106. OM is about the length of CM; but O Mr is about fourthousand miles shorter than CM: hence OMf is aboutfour thousand miles shorter than OM. Notwithstanding the moon is much nearer when at thezenith than at the horizon, it seems to us much larger at thehorizon. This is a pure illusion, as…
Astronomy
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