Most of the time, planets are observed to
A) be stationary with respect to background stars
B) move eastward with respect to background stars
C) move due south with respect to background stars
D) move westward with respect to background stars

Question

Quizplus · Accepted Answer

Planets appear to move eastward with respect to the background stars over time due to their own orbital motion around the Sun. This is known as their apparent retrograde motion.

Most of the Time, Planets Are Observed to