Question

meaning of pole star

Answer 1

A pole star or polar star is a star, preferably bright, closely aligned to the axis of rotation of an astronomical object. With regard to planet Earth, the pole star refers to Polaris, a magnitude 2 star aligned approximately with its northern axis, and a pre-eminent star in celestial navigation.

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Answer 2

A pole star is a visible star, preferably a prominent one, that is approximately aligned with the Earth's axis of rotation; that is, a star whose apparent position is close to one of the celestial poles, and which lies approximately directly overhead when viewed from the Earth's North Pole or South Pole.