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 117
rate of one degree in four minutes, itwould take it some fifty minutes to come up to the moon scas to bring her upon the horizon. Hence the daily retarda-tion of the moons rising is about fifty minutes; but it varies considerably in differ-ent parts of her orbit. There are two reasons forthis… … Fig. 116. the moon is at perigee, and least when she is at apogee. (2) The moon moves at a varying angle to the horizon.The moon moves nearly in the plane of the ecliptic, and ofcourse she passes both -equinoxes every lunation. When sheis near the autumnal equinox, her path makes the greatestangle…
Astronomy
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