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According to Kepler's second law, when is a planet moving fastest?
AWhen it is farthest from the Sun
BWhen it is closest to the Sun
CWhen it crosses the minor axis
DWhen it is at the aphelion
Answer & Solution
Correct answer: B. When it is closest to the Sun
To sweep equal areas in equal times, the planet must move faster when its distance from the Sun is smaller.
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