6. Harminder's grandfather told him that there is one
star in the sky, whose position remains same.
Which is that star?
(a) Sirius
(b)Halley
(c)Pole star
(d) Neptune
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Answer:
(c) Pole Star
Explanation:
The pole star is the brightest star in the sky and it is known by some other names also; North star (Northern hemisphere star), spelled pole star, Polaris, and Dhruvtara (in India). It always appears at any particular time nearest to either celestial pole.
It is the only star that remains constant in its position in the sky and lies along the axis of the rotation of the earth.
It is proved as a very useful astronomical tool, which is used to find the directions while traveling and to locate the positions of other stars revolving around the axis of rotation with the earth.
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