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 309
n, they moveoff into space, never to return, unless deflected hither bythe action of some heavenly body which they pass in theirjourney. Since a comet is visible only while it is near the sun, it isimpossible to tell, by the form of the portion of the orbitwhich it describes during the period of… … ASTRONOMY. 283
Astronomy
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