Names and boundaries of constellations named after celestial bodies

In China, constellations are equivalent to the 28 constellations of three yuan (four elephants) and the officials of each star. This system was formed as early as the end of the Spring and Autumn Period. There are 89 star officials and more than 500 star officials listed in the Book of Heaven. The Book of Jin? The chronicle contains 283 stars and 1464 stars. In Japan, star officials also have their own naming methods.

In Europe, astronomers of past dynasties randomly divided the sky into constellations according to the style of feeling. At first, there were only descriptions of shapes, and the names and numbers of constellations in different star maps were different. Later, they were related to the stories of gods in Greek mythology. At that time, the constellations had no scientific significance, but only served as a reference for people (including astronomers) to observe the sky or record the behavior of comets. In the past, the most famous map was Jahannes Hewelius.

It was not until 1930 that the international astronomical union determined the boundaries of various constellations, unified the standards, and drew the star map in a universal way, so that every celestial body on the celestial sphere could definitely belong to a specific constellation at a certain moment.