Will the position of the North Pole Star change?

Polaris is a bright star in the northern part of the sky, close to the north celestial pole and almost opposite the earth axis. From the earth's point of view, its position is almost unchanged, which can be used to identify the direction. Because of precession, Polaris is not eternal, and it will cycle once every 2000 years. For example, during Magellan's voyage, Polaris was about 8 degrees from the north celestial pole. Now, Polaris is closer to the north celestial pole, with an angle difference of only 40 points.

According to the calculation of the earth's axis swing and the star's gravity, by 2 100, Polaris will reach the nearest position directly above the North Pole, only 28 minutes away from the North Pole, and then it will gradually move away from the North Pole.

Polaris is now very close to the sky pointed by the North Pole of the Earth. Therefore, it always seems to be in the northern sky. It is because of its important position that it is famous. In fact, according to the brightness, it is just an ordinary two-star, belonging to the "small three."

Polaris is the brightest star in Ursa minor, also known as Alpha in Ursa minor. It is an F-type high luminosity star with late spectrum. It is about 400 light years away from the earth and its mass is about five times that of the sun. It is the nearest bright star to the earth. In the constellation diagram, it is at the tip of the bear's tail.

Polaris