What was astronomy called in ancient times?

In ancient China, emperors believed that the rise and fall of the kingdom, the change of dynasties and the merits and demerits of the wise emperor were closely related to the astronomical phenomena. For example, if there is a comet, the emperor should review whether he has made any mistakes. Therefore, the study of astronomy became the patent of emperors, that is, "Wang Xue".

1, define the time and determine the farming time.

It is easy to understand that people's work and rest are influenced by the sun and agricultural production is determined by the climate. The definition of any civilization calendar is inseparable from astronomy, so the role of astronomy is necessary, no matter which civilization.

2. Observe the astronomical phenomena and predict good or bad luck.

Astronomy and astrology were integrated in ancient times. Just look at the spelling of the word "astro-" and you will know their kinship. Even today, astrology can still be favored by many young people

3, the unity of heaven and man, establish orthodoxy.

This may be a characteristic of China. Du Fu's "Climbing the Stairs" is an example of "the North Pole will not change, and bandits dare not take risks from the Western Hills", which means that the heaven near the North Pole is the residence of heaven and earth, and the good or bad luck of the royal family can be predicted. If the origin of Ziwei is bright and smooth, it means that Wei Zhi is clear, and vice versa.