When a planet retrogrades, it appears to move westward for weeks at a time.

Name: When a planet retrogrades, it appears to move westward for weeks at a time.
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Quizplus · Accepted Answer

When a planet retrogrades, it appears to move westward for weeks at a time. This is an optical illusion caused by the relative positions of the Earth and the planet in question as they orbit the Sun. When a planet retrogrades, it appears to move westward for weeks at a time.

When a Planet Retrogrades, It Appears to Move Westward for Weeks