A) The time taken by the earth to revolve around the sun
B) The time taken by the sun to revolve around itself
C) The time taken by the earth to revolve around itself
D) The time taken by the sun to revolve around the centre of the galaxy, the Milky Way.
Correct Answer: D
Solution :
A cosmic year is the time taken by the sun to revolve around the Milky Way galaxy.You need to login to perform this action.
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