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 21
thesection are represented bystraight lines. Thus, in Fig. 2. we have a diagram representingin section the sphere of Fig. 1. The straight lines AN, SB.MM, and SN, represent the corresponding circles of Fig. 1. The axis of a sphere is the diameter on which it rotates.The poles of a sphere are the… … ASTRONOMY. 5
Astronomy
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