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 120
urnedtowards the earth as when the moon was at M. While themoon passes from M to Mf. her axial motion gets in advanceof her orbital motion, so that A B is again inclined to the linejoining the centres of the earth and moon. A portion of theeastern limb of the moon beyond B is now brought into… … Fig. 119. (3) Parallactic Libration. — While an observer at thecentre of the earth would get the same view of the moon, 104 ASTRONOMY. whether she were on the eastern horizon, in the zenith,or on the western horizon, an observer on the surface ofthe earth does not get exactly the same view in…
Astronomy
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