Question

The duration of a star day is

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

Answer 1

The correct option is C 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.