If the elliptical orbit of Mercury were more eccentric,its precession rate would be
A)larger than it is now.
B)smaller than it is now.
C)the same as it is now.
D)nonexistent.

Question

Quizplus · Accepted Answer

The precession rate of Mercury's orbit is primarily due to the interactions with the gravitational field of the Sun. If the eccentricity of its orbit were larger, this would increase the strength of the Sun's gravitational pull at perihelion (closest approach to the Sun) and decrease it at aphelion (farthest distance from the Sun). This would lead to a larger tidal effect on Mercury and a larger precession rate. Therefore, the correct answer is (A) larger than it is now.

If the Elliptical Orbit of Mercury Were More Eccentric,its Precession