Among the Big Dipper, which is the Big Dipper and which is the North Star?

The Big Dipper is the seven stars in Ursa Major arranged in the shape of an ancient spoon, so it is called the Big Dipper. The Big Dipper is Shu Tian (α Ursa Major), Tian Xuan (β Ursa Major), Celestial Pole (γ Ursa Major), Tian Quan (δ Ursa Major), Yuheng (ε Ursa Major), Kaiyang (ζ Ursa Major) and Yaoguang (η Ursa Major). Among them: Shu Tian, Tian Xuan, Tianji and Tian Quan constitute the Xuan Ji (barrel) located at the tail of the bear; Yuheng, Kaiyang and Yaoguang form Yuheng (bucket handle), which is located on the bear's hip.

Polaris (Alpha Ursa minor) is called Polaris because it is always in the north. The ancients thought that all the stars in the sky revolved around Polaris, so it was also called purple MSI or purple micro-ring. Shu Tian Tian Xuan of Beidou is about five times the distance between the extension lines of two stars.