Star names of ancient emperors

Gou Chen: The name of the ancient star belongs to Ziweiyuan. It consists of six stars, belonging to Ursa minor, the alpha star of Ursa minor, which is now the Polaris.

The "sentence Chen, hook Chen and hook Chen" recorded in history books are all "hook Chen" written now. Historical Records Tianguanshu and Hanshu Tianwenzhi are both written into four-star sentences. The official history "Tian Wenzhi" began to "hook up". However, from some preserved weft books, we can know that there has been a saying of "hooking up six stars" since the later Han Dynasty.

Gou Chen (also called Gou Chen), the English curved array, the official name of the star, belongs to Ziweiyuan, ***6 stars, and 4 stars are α, δ, ε and ζ of Ursa major; Cepheus has two stars. Shaped like a hook, it was regarded as the harem of the Yellow Emperor and the princess of the Emperor of Heaven in ancient times. "Star Classic": "The six stars of Hook Chen are under the five emperors." Song of the sky: "before the six stars and six bodies of Chen, the emperor was alone in Chen."

Gou Chen is the North Star, also known as Beichen, Bear Alpha and the North Star in the West. It is a binary star and a variable star (from 1.97 to 2. 12 and so on. The dimming period is 3.969778 days, that is, at 23: 00 on the 3rd, 16 minutes and 28.8 seconds. ), 18 has 1 9, so Polaris is a three-star cluster. 400 light years from the sun. At present, it is about 1 from the North Pole, and it approaches about 15 every year. The minimum angular distance is126'30 in 995.