Question

How does the position of the pole star help determine the shape of earth?

Answer 1

Pole Star is the brightest star in the night sky, when one looks up to the sky from any place on the earth.
As it is a huge star that is far away from earth, it looks stationary even though the earth is rotating.
When looked from the North Pole, it appears to be vertically above and closest to the earth.
However, its position seems to change a bit to a tilting position, as a person moves away from the North Pole, thus proving that the earth is a sphere.

Answer 2

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