An Apparent Westward Motion of a Planet in the Sky

question 142

Multiple Choice

An apparent westward motion of a planet in the sky compared to the background stars (as viewed from Earth) when observed on successive nights is referred to as

• A)epicycle.
• B)retrograde motion.
• C)prograde motion.
• D)heliocentric motion.
• E)deferent.

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Definitions:

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