Question

What is the apparent backward motion of Mars in the night sky known as?

A. retrograde motion
B. prograde motion
C. intrograde motion
D. reversal motion

Answer 1

Retrograde motion- the illusion happens with Jupiter and the other planets in the solar system orbit farther from the sun.

Answer 2

Answer choice A

Step-by-step explanation:

This apparent erratic movement is called "retrograde motion." The illusion also happens with Jupiter and the other planets that orbit farther from the sun. Just to make things a little more odd, the orbits that Earth and Mars follow don't quite lie in the same plane.