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 311
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 determined only by its velocity, taken in con-nection with its distance from the sun. Were a comet ninety-two and a half million miles from the… … Fig. 319. a hyperbola, and, with a less velocity, an ellipse. So, at anydistance from the sun, there is a certain velocity which wouldcause a comet to describe a parabola; while a greater velocitywould cause it to describe a hyperbola, and a less velocity todescribe an ellipse. If the comet is…
Astronomy
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