Does the handle of Polaris really point to Polaris?

The Big Dipper is a part of Ursa major. Graphically, the Big Dipper is located at the back and tail of Ursa Major. Of the seven stars, six are secondary and one is tertiary. By connecting the two stars at the mouth of the barrel, it moved about five times towards the mouth of the barrel, and the Polaris was found. The star recognition song includes: "First recognize the stars from the Big Dipper, and then spread from north to west." Beginners can look for it from the Big Dipper in turn.

The Big Dipper was named α, β, γ, δ, ε, ζ and η from the upper end of the bucket to the end of bucket handle, which were named in ancient China.

They are: Shu Tian, Tian Xuan, Tianji, Tian Quan, Yuheng, Kaiyang and Yaoguang. Starting from Tian Xuan, a straight line extends outward through Shu Tian, about.

If it is more than five times longer than it, you can see a star almost as bright as the Big Dipper, which is the North Star. Taoism calls the Big Dipper King Xie Hexing, who lives in the north.

The seven palaces are: Shu Tiangong Wolf-Hungry Star Jun, Tian Xuan Palace Giant Gate Star Jun, Tianjigong Lucun Star Jun, Tianquan Palace Wenqu Star Jun, Yuheng Palace Lian Zhen Star Jun, Kaiyang Palace Wu Qu Star Jun and Yaoguang Palace Broken Army Star Jun.

Some Taoist books also say that according to the time of birth, a person's life is divided into seven star kings: "greedy wolves are too star kings, and children are born;" The giant gate is a distant king, and the ugly returnee is a stranger; Road inch is a real star, and strangers belong to it; Wenqu Xinxing Jun, born by strangers; Lian Zhen Port promotes the army, and Shengsheng Chen belongs to it; Wu Quji is a stranger and a stranger. " Everyone can find his main star according to his date of birth.

Shu Tian, Tian Xuan, Celestial Pole and Tianquan are all four stars, which constitute the "bucket" of the Big Dipper. The handle-shaped three stars are Yuheng, Kaiyang and Ursa Ursa.

Bright and dark binary stars. The star in the center of the handle is called Kaiyang, with a distance of 1 1 and a fourth-class companion star called auxiliary star. Kaiyang and the auxiliary star form a binary star, which can be recognized by the naked eye. Kaiyang itself is also a binary star.

The position of the Big Dipper in the sky is different in different seasons. Therefore, the ancients in China determined the four seasons according to their position changes: "bucket handle refers to the east, and the world is spring; Bucket handle guide, the world is summer; Bucket handle refers to the west, and the world is autumn; Bucket handle refers to the north, and the world is winter. "

Among the Big Dipper, "Yuheng" is the brightest, and its brightness is almost close to the first-class star. Tianquan is the darkest and a third-rate star. The other five stars are second-class. There is a small companion star near Kaiyang, which has been attracting people's attention with its beautiful and clear appearance. It is said that ancient Arabs used it to test soldiers' eyesight when recruiting.

The Big Dipper has been moving slowly in the sky. Five of the stars move in one direction at roughly the same speed, while Shu Tianhe and Yao Guang move in the opposite direction.

Therefore, in the long cosmic changes, the shape of the Big Dipper will change greatly. After 654.38+ million years, we will not see this handle shape.