A new manual of the elements of astronomy, descriptive and mathematical .. (1868)
Kiddle, Henry, 1824-1891 · New York, Ivison, Phinney, Blakeman & co.; Chicago, S.C. Griggs & co. · leaf 127
axis to theecliptic. 174. Owing to the small inclination of the moons axisto the plane of the ecliptic (1° 31), she can have but very-little change of seasons, and that not constant, because heraxis does not always point in the same direction. a. From what has been said above (Art. 173, d), it will… … THE MOON. 123 that the lunar solstices and equinoxes change places with each otherevery 9^ years; whereas, the period required for a similar change inthe earth, occasioned by precession, is about 13,000 years. 175. A lunar day must be nearly 15 times as long as oneof our days, and a lunar night of…
Astronomy
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