Multiple Choice
Why does the Gregorian calendar use leap years?
A) because the tropical year is 365 days, 5 hours, adn 49 minutes long
B) because the sidereal year is 365 days, 6 hours, and 9 minutes long
C) becasue the Earth's axis is precessing
D) because the Earth's rotation is slowing down
Correct Answer:
Verified
Correct Answer:
Verified
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