n, that is, the perihelion distanceby these ob- of the comet, the position of the perihelion, the instant of passing thisservations. point, the inclination of the orbit to the ecliptic, and the position ofits nodes. These five elements being known, we can assign the posi-tion of the comet for any… … COMETS. 147 About 120 comets have been calculated upon the theory of the Chap. xn. parabolic motion, and the observed places are found to answer to such a supposition. We can have no doubt, therefore, that this is conform- T 111 /* ttt i .i Inclinations able to the law of nature. We have thus…
Astronomy
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