The underlying problem that led to the discovery of Neptune was:
A) Why the orbital path of Uranus deviated from what was predicted.
B) Why the orbit of Uranus is elliptical.
C) Why the orbital path of Saturn deviated from what was predicted.
D) Why the moons of Jupiter failed to influence the rotation of Jupiter.
E) Why Saturn has a greater mass than Uranus.

Question

Quizplus · Accepted Answer

Astronomers noticed that the orbit of Uranus did not match predictions made by Newton's laws of motion and gravitation. They suspected that there must have been another planet with a gravitational influence affecting the orbit of Uranus, and eventually discovered Neptune.

The Underlying Problem That Led to the Discovery of Neptune