A planet orbits in an elliptical path of eccentricity e around a massive star considered fixed at
Channel: Doubtnut
Date: 2020-08-30

A planet orbits in an elliptical path of eccentricity e around a massive star considered fixed at one of the foci. The  point in space where it is closest to the star is denoted by P and the point where it is farthest is denoted by A. Let `v_(p)`  and `v_(a)`  be the respective speeds at P and A. Then–