You are observing the night sky from Mars. Which objects would you be able to see undergo retrograde motion in your night sky?
A) Only the planets that are more distant from the Sun than Mars
B) Only the planets located between Mars and the Sun
C) Only Earth and Venus
D) All planets

Question

Quizplus · Accepted Answer

From Mars, only the planets that are more distant from the Sun than Mars would be observed to undergo retrograde motion. This is because retrograde motion is observed when Earth (or in this case, Mars) overtakes another planet in its orbit, which can only happen with planets that are further from the Sun than the observing planet.

You Are Observing the Night Sky from Mars