The concept of constellation

Constellation is an indispensable part of astrology and a group of stars in the sky. Since ancient times, human beings have associated three or five stars with their mythical figures or artifacts, which are called "constellations". From 65438 to 0930, the International Astronomical Union divided the sky into 88 official constellations, which had precise boundaries and were based on ancient Greek myths handed down from the Middle Ages. These constellations are widely used in the field of navigation, and they are almost the means to determine the orientation of the sky in all civilizations.