The apparent backward movement of a planet is called
A. heliocentric motion.
B. retrograde motion.
C. eccentricity.
D. Kepler's first law of motion
The apparent backward movement of a planet is called RETROGRADE MOTION.
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Asked 12/22/2015 3:55:23 PM
Updated 12/23/2015 4:54:22 AM
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selymi [12/23/2015 4:54:22 AM]
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