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 310
Fig- 3*7- part a&, in each case, is the portion of the orbit describedby the comet during its visibility. While describing the dotted … Fig. 318. portions of the orbit, the comet is invisible. Now it is impos- 284 ASTRONOMY. sible to distinguish the form of the visible portion in thetwo orbits. The same would be true were one of the orbitsa hyperbola. Whether a comet will describe an ellipse, a parabola, or ahyperbola, can be…
Astronomy
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