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Question

The duration of a star day is

A
24 hours 6 minutes and 4.09 seconds
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B
23 hours 18 minutes and 4.09 seconds
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C
23 hours 56 minutes and 4.09 seconds
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D
23 hours 15 minutes and 4.09 seconds
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Solution

The correct option is D 23 hours 56 minutes and 4.09 seconds
One star day is the amount of time interval after which a star appears back at its position in the night sky every night because of the rotation of the Earth. It takes a star 23 hours 56 minutes and 4.09 seconds to come back to its previous position in the sky after every night.

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