Which direction is the Big Dipper?
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. " In ancient times, Polaris was regarded as a symbol of God, and Beidou was the imperial chariot that God drove when he traveled around the world. The year began in spring, when Beidou was in the east, so God began to patrol from the east, so Yi Zhuan: "The Emperor was shocked" and divination was in the east.
Extended data:
This big spoon is in the sky all year round, and the direction of the handle changes in different seasons, and one season happens to be one direction. In the words of the ancients, it is: "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 it is winter in the world. " There was no calendar in ancient times, so people used this method to calculate the four seasons. Of course, due to the rotation of the earth, this phenomenon must be seen after eight o'clock in the evening.
March to May is spring every year. Take the starry sky seen at eight or nine o'clock in the middle of April as an example. Then you will see the Big Dipper bucket handle pointing east. June to August is summer every year. Take the starry sky seen at eight or nine o'clock in mid-July as an example. At this time, the bucket handle of the Big Dipper points to the south. September ~ 165438+ 10 is autumn every year. Take the starry sky seen at eight or nine o'clock in the middle of 65438+ 10 as an example.
At this time, the Big Dipper has come to the north at low altitude. Generally speaking, it is not easy to see the Big Dipper in the area south of the Yangtze River valley in China at this time. However, please rest assured, you have to realize that there is still an "assistant" to replace the Big Dipper, and that is the Hou Xian constellation. At this time, the constellation Xianhou appeared above the head. Its main bright star forms a W-shape.
You can also find Polaris by extending the connection between Alpha and κ. Every year from February 65438 to February of the following year is winter. Take the starry sky seen at eight or nine o'clock in the middle of June 65438 as an example. Although the weather is cold in winter, the bright stars in the starry sky in winter night are more magnificent than the other three seasons. At this time, the Big Dipper has reached the northeast sky, and bucket handle points to the north.
"Historical Records Tianguanshu" records: "Auxiliary stars are bright and close, and auxiliary ministers are strong; Weak. " "Jin Shu Tian Wenzhi": "The auxiliary star is rich in Kaiyang, so the auxiliary war is successful, and so is the prime minister. Seven political stars are bright, their country is prosperous, and they are auxiliary stars, so the minister is strong. " Song? What? ? "Chun Zhu's story: the stone color is sky blue, the thin pool contains seven stars, arranged like a bucket, and the auxiliary stars are in the clouds. Because the purpose is to fight for the stars. " Ming? He Jingming? "Complain": "Make the Beidou shake its discipline and make the auxiliary star assist it."
Kaiyang is a famous binary star. Its companion star (Xiong 80) was named "Fu" in ancient China, with an angular distance of 1 1'49 "and a brightness of 3.95. The ancient army used this pair of binary stars to test soldiers' eyesight, which was used by both Chinese and foreign armies.
The auxiliary star Ursa Major 80 is the companion star of Ursa Major ζ (Kaiyang), also known as Zuo Fu. Many people use this auxiliary star to measure their eyesight. If we can distinguish this auxiliary star, our vision will reach 1.5.
References:
Baidu Encyclopedia: The Big Dipper