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2015-06-28T18:52:58+05:30

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A pole star is a visible star, preferably a prominent one, that is approximately ... the stars' proper motions), the role of North Star passes from one star to another.
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2015-06-29T14:13:34+05:30

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Pole star is situated due north of earth's axis. So it's position in the sky never changes with respect to earth and helps in determining direction in night
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