Aditya came to know from his father that pole star is a very special star. In ancient times, it was one of the main indicators of direction at night. What is so special about this star?

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Solution

Stars appear moving because of Earth's rotation. But pole star is located in direction of Earth's axis. So there is no effect of rotation on the angle of vision between Earth and the pole star. Hence, it does not move in the sky.

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