To the east, bucket handle points to the south in summer, bucket handle points to the west in autumn and bucket handle points to the north in winter.
The ancient book "Guo Guanzi" records: "Dou Dong refers to human spring; Fighting in the south and fighting in the north, the world is summer; Fighting against the west means that the world is autumn; The northern war is the winter in the world. " Therefore, ancient China people determined the four seasons according to its position change. "Shi Gan Jing Jing": "Beidou is called the Seven Houses, the Minister of the Emperor, and the Emperor Car." The emperor sat on the Big Dipper and inspected the four directions, and it was cold and hot at four o'clock.
The Big Dipper is seven connected planets, and it is an important group of stars in the night sky to indicate the direction and observe the position of constellations. There are seven planets in the Big Dipper from beginning to end, named Shu Tian, Tian Xuan, Celestial Pole, Tianquan, Yuheng, Kaiyang and Yaoguang in turn. These seven planets are connected together like spoons, and each planet has its own existence and significance.