Question

How does the following prove the circular shape of the earth:

Pole Star

Answer 1

The Pole Star (or Polaris) proves the Earth’s circular shape because its apparent height in the sky changes as you move across different latitudes.

• At the North Pole, the Pole Star appears directly overhead at a 90° angle.
• As you move towards the Equator, the Pole Star lowers in the sky, and at the Equator, it appears on the horizon at a 0° angle.

This variation occurs because the Earth is curved, and as you move along the surface (which is spherical), your position relative to the Pole Star changes. If the Earth were flat, the Pole Star would appear at the same height for everyone, regardless of their location. Therefore, the changing position of the Pole Star as you travel supports the idea of a spherical Earth.