How many constellation regions will the whole sky be divided into?

In ancient China, the starry sky was divided into several regions, which were called stars or stars, similar to constellations. The Book of Celestial Officials in Historical Records by Sima Qian in the Western Han Dynasty describes in detail that the starry sky is divided into five celestial realms: the middle official, the east official, the west official, the south official and the north official.

Chen Zhuo, a native of the State of Wu during the Three Kingdoms period, was the master and founder of the ancient astrological map of China. He divided the starry sky into 283 stars, 1465 stars, based on the all-sky star map of Gander, Shishen and Wuxian. 283 officials include star officials such as Sanyuan and Erba Hostel. By the Sui Dynasty, the division of starry sky in China had been basically fixed, and it had been used until modern times. These are the famous three walls, four elephants and twenty-eight nights.

Extended data:

Twenty-eight constellations (division of celestial spheres in ancient astronomy in China)

On the basis of four elephants, each elephant is divided into seven sections. The first paragraph is called "Accommodation", which consists of twenty-eight accommodations, circling the sky for one week. Twenty-eight nights is where the moon passes. The cycle of the moon's revolution around the earth is more than 27 days, and it takes about one night a day. Therefore, the twenty-eight nights are not only the division of the starry sky, but also the basis for making calendars.

The four elephants refer to the black dragon in the east, the white tiger in the west, Suzaku in the south and Xuanwu in the north. Xuanwu means turtle.

Baidu encyclopedia-China ancient starry sky branch