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 264
rtions are bodiesof land and water. In the vicinity of the poles brilliant white spots may benoticed, which are considered by many astronomers to bemasses of snow. This conjecture is favored by the factthat they appear to diminish under the suns influence atthe beginning of the Martial summer, and… … Fig. 268. planet rotates in about twenty-four hours on an axis in-clined about twenty-eight degrees from a perpendicularto the plane of its orbit. The inclination of the axis isshown in Fig. 269. It is evident from the figure that thevariation in the length of day and night, and the changeof…
Astronomy
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