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 269
with the corre- 244 ASTRONOMY. sponding portion of the sky. Fig. 272 shows at the righthand the squares in the telescopic field of view, and at theleft hand the corresponding squares of the map. He can then assure himself if the numbers and positions ofthe stars mapped, and of the stars observed,… … Fig. 272. the map was made, or it is a planet, or perhaps a comet. Ifthe new body remains fixed at the same point, it is the former;but, if it changes its position with regard to the neighboringstars, it is the latter. The motion is generally so sensible, thatin the course of one evening the change…
Astronomy
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