Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York : H. Holt and company · leaf 37
e has no real ex-istence, yet by conceiving of it as a reality, and supposingcertain lines of reference drawn upon it, we are enabled to 16 ASTRONOMY. form an idea of tlie relative directions of the heavenlybodies. We may conceive of it in two ways : firstly, ashaving an infinite radius, in which… … FlG. 5.—STARS SEEN ON THE CELESTIAL SPHERE. tre with him wherever he goes. The first assumption willprobably be the one which it is best to adopt. The objectattained by each mode of representation is that of havingthe observer always in the centre of the supposed sphere.Fig. 5 will give the reader…
Astronomy
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