what is a pole star

A pole star is a visible star, preferably a prominent one, that is approximately aligned with the Earth'saxis 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. A similar concept also applies to other planets than the Earth. In practice, the term Pole Star usually refers toPolaris, which is the current northern pole star, also known as the North Star.

The south celestial pole currently lacks a bright star like Polaris to mark its position. At present, thenaked-eye star nearest to this imaginary point is the faint Sigma Octantis, which is sometimes known as the South Star.

In ancient times, people used to determine directions during the night with the help of stars. The north star indicates the north direction. It is also called the pole star. It always remains in the same position in the sky.

In ancient times, people used to determine directions during the night with the help of stars. The north star indicates the north direction. It is also called the pole star. It always remains in the same position in the sky.