Belongs to Ursa minor _ part of Ursa minor is

Analysis: Which constellation is Polaris in?

When we live in the wild, we often need a spare compass. However, near the mine with strong magnetic force, or in the absence of a compass, besides the setting of the sun, Polaris in the bright starry sky is also our guiding light, guiding us to find the right direction. So, which constellation does Polaris belong to? Let's have a look!

Polaris is located in Ursa minor, about 430 light years away from the earth. It is a star with stable brightness and position that can be seen in the night sky. Because Polaris is closest to true north, people on earth have been navigating by its starlight for thousands of years.

Polaris is a bright star in the northern part of the sky. It is very close to the North Pole of the Earth and almost opposite to the Earth's axis. Seen from the earth, its position is almost unchanged, so it can be used to identify the direction. Due to precession, Polaris is not an eternal star. Now it is alpha Ursa minor, and it will be Vega in the year of 14000.

Polaris is now in the sky, pointing to 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 second-class star, belonging to the "younger generation." It is more than 300 light years away from us. Polaris belongs to the brightest star in Ursa minor, also known as Alpha in Ursa minor. China called it "Gouchenyi" or "Beichen" in ancient times. On the constellation diagram, it is on the tip of the bear's tail.

Speaking of which, maybe you have to ask: Will Alpha Bear always enjoy the title of Polaris? Or, does the north pole of the earth's rotation axis always point to this star? First of all, it should be pointed out that the rotation axis of the earth is also slowly swinging periodically. Therefore, the position of the sky referred to by the north pole of the earth's rotation axis naturally changed. It can be seen that the "throne" of Polaris also has the possibility of taking turns to sit in the village. Astronomers have made it clear for a long time that 4800 years ago, Polaris was not the present alpha star of Ursa minor, but the alpha star of Draco called right pivot in ancient China. At that time, the right fulcrum won the honor of Polaris. By the year 1000, that is, the early years of the Northern Song Dynasty in China, the sky referred to by the North Pole of the Earth was 6 degrees away from the current Polaris, the alpha star of the constellation Ursa minor.

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