Which of the following is true of the motion of the planet Mars among the stars?
A)All retrograde loops occur in the same constellation.
B)All retrograde loops have the same shape.
C)Retrograde loops always are separated by the same interval of time.
D)Retrograde loops occur when Mars is in conjunction (near the Sun in the sky)

Question

Quizplus · Accepted Answer

Retrograde motion occurs at regular intervals as Earth, in its faster orbit, overtakes Mars, making Mars appear to move backward against the stars. This regularity is due to the predictable orbits of Earth and Mars around the Sun.

Which of the Following Is True of the Motion of the Planet