A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 279
me. ellipses; all, however, having the same period, and the same length of semi-major axis ; namely, a = 2 r; V2 being taken equal to J U2. For a fourth body, V2 is taken as = ^Z72, and with the direction of motionperpendicular to r. This body will move in a perfect circle, a coming out 2G6 CKNTKAL… … Fig. 145. — Van tier Kolks Theorem. 434. Velocity of a Planet at Any Point in its Orbit. — If A A (Fig. 145) be the major axisof a planets orbit, and KKthe diameter of a circle de-scribed around 5 with A A asradius, then the velocity of aplanet at any point, N, on itsorbit is equal to that which…
Astronomy
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