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Question
What is a sidereal day?
Options:
A .  Time taken by earth to rotate about its axis for distant stars to appear fixed
B .  Time taken by earth to rotate about its axis for sun to appear fixed
C .  Time taken by earth to rotate about its axis for distant stars to be moved by 1 degree
D .  Time taken by earth to rotate about its axis for distant stars to be moved by 0.5 degrees
Answer: Option A
Answer: (a).Time taken by earth to rotate about its axis for distant stars to appear fixed
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