How many constellations are there in the world?

1930, in order to unify the complicated constellation division, the International Astronomical Union divided the sky into 88 official constellations with precise boundaries, so that every star in the sky belongs to a specific constellation. Most of these official constellations are based on ancient Greek myths handed down from the Middle Ages.

Extended data:

Constellation is a means to determine the orientation of the sky in almost all civilizations and is widely used in the field of navigation. The division of constellations is completely artificial, and different civilizations have different divisions and names. There was no uniform and precise boundary for constellations until 1930, when the International Astronomical Union divided the sky into 88 official constellations with precise boundaries in order to unify the complicated constellation division.

Let every star in the sky belong to a specific constellation. Most of these official constellations are based on ancient Greek myths handed down from the Middle Ages. In contrast, some widely circulated star combinations are not recognized as official constellations, such as the Big Dipper (see star list).