Planets do not move in precise ellipses, as had been thought by Kepler, because of
A) dust grains and other material that disturbs the orbits.
B) influences due to the other planets.
C) Both of the above.
D) Nonsense-- the planets actually do move in precise ellipses.

Question

Quizplus · Accepted Answer

Planets do not move in precise ellipses because of both dust grains and other material that disturbs the orbits, as well as influences due to the other planets.

Planets Do Not Move in Precise Ellipses, as Had Been