The Big Dipper refers to Shu Tian, Tian Xuan, Celestial Pole, Tianquan, Yuheng, Kaiyang and Yaoguang in the constellation Ursa Major. The ancients associated these seven stars together and imagined them as barrels of wine in ancient times, hence the name Beidou.
The Big Dipper appears in different directions in the sky in different seasons and at different times at night, so the ancients decided the seasons according to the direction pointed by bucket handle when he fainted for the first time: bucket handle points to the east, and the world is spring; Guide to barrel handle, it's summer in the world; Bucket handle refers to the west, and the world is autumn; The barrel handle refers to the north, and it is winter all over the world.
Shu Tian, Tian Xuan, Tian Ji and Tianquan are composed of Dou Shen and Gu Yue Kui. Yuheng, Kaiyang and Yaoguang are composed of bucket handle, which was called Piao in ancient times. Difference: The seven stars in Ursa Major are called Little Beidou; The emperor star is in Ursa minor, and Beidou is in Ursa major. The so-called bucket is an emperor car.
The Big Dipper is named α, β, γ, δ, ε, ζ and η respectively from the upper end of the bucket to the end of bucket handle. Ancient astronomers in China called them Shu Tian, Tian Xuan, Tianji, Tianquan, Yuheng, Kaiyang and Yaoguang respectively.
A straight line from Tian Xuan runs through Shu Tian, which is about five times as long as it. You can see a star as bright as the Big Dipper, which is the North Star.
2, Nandou six stars
Tianfuxing (the first star in Nandou, known as Ling Xing in astronomy), Dawn Star (the second star in Nandou, known as Silver Star in astronomy), Tianjingxing (the third star in Nandou, known as Dousan in ancient times), Tiantongxing (the fourth star in Nandou, known as Fuxing in ancient times) and Astronomical Satellite (the fifth star in Nandou).
3.28 stars
Twenty-eight constellations are the twenty-eight constellations divided by ancient astronomers in China to observe the movement of the sun, the moon and the five stars, and they are the creation of local celestial literature in China. Used to explain the position of the sun, the moon and the five stars. Details are as follows:
Twenty-eight stars:
Seven Nights of the Oriental Black Dragon: Jiao, Kang, Bian (dρ), Fang, Xin, Wei and Ji (jρ).
Seven nights in northern Xuanwu: fighting (dǒu), cows, women, emptiness, danger, houses and walls.
Seven Nights of the West White Tiger: Kui, Lou, Chang, Bi, Gou and Shen.
Seven Nights in South Suzaku: Well, Ghost, Willow, Star, Zhang, Wing and Zhu.
There are several stars every night. As an important part of China's traditional culture, it has been widely used in ancient astronomy, religion, literature and astrology, astrology, geomantic omen, lucky choice and so on.
4. ternary
The three walls, namely, the Forbidden Zone, the Taishang Temple Zone and the Tianshi City Zone, are collectively referred to as the three walls on the ecliptic for twenty-eight nights.
Ziweiyuan is the middle wall of three yuan, living in the center of the northern sky, so it is also called Zhonggong, or Ziweiyong. Wei Zi Palace means Imperial Palace, and most stars are named after official names. There are 15 stars in the northeast of Beidou, which are arranged east and west, with Polaris as the center, forming a screen fan shape.
Taiwei Courtyard is the upper wall of Sanyuan, located in the lower northeast of Ziwei Courtyard. There are 10 stars in the south of Beidou, in the north of Yachongzhou and Yisu, which are fan-shaped and centered on the Five Emperors.
Shi Tian Wall is a three-dimensional lower wall, which is located in the southeast direction under Wei Zi Wall. In the northeast of Su Fang and Shinjuku, there are 22 stars, centering on the throne, forming a screen-like fan.
5. Low humidity plain
Vega, also known as Vega or α (Lyra α), is the brightest star in Lyra, about 25 light years away from the earth.
From the south-central latitudes, winter can be seen above the northern horizon of the southern hemisphere. At declination +38.78, Vega can only be seen in the area north of 51south latitude.
Baidu Encyclopedia-Big Dipper
Baidu Encyclopedia-Nandu
Baidu encyclopedia -28 stars
Baidu Encyclopedia-Sanyuan
Baidu encyclopedia-Vega