Multiple Choice
When Mercury is seen 18° from the Earth-Sun line, it will be visible a little less than 1 hour after sunset. What is the most important value in determining this time?
A) Mercury's rotation period about its axis
B) Mercury's sidereal period
C) Earth's rotation period about its axis
D) Earth's sidereal period
Correct Answer:
Verified
Correct Answer:
Verified
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