Introduction of 88 constellations

In ancient times, 1 connected the scattered stars in the sky with imagination, so as to identify the orientation and observe the astronomical phenomena during the voyage. Half of them were named in ancient times, and their naming methods include myths and epics of Mesopotamia, Babylon, Egypt and Greece. The other half (mostly in the night sky of Southern Hemisphere 2) was named only in modern times, and is often named after navigation instruments. 1930, in order to unify the complicated constellation division, the International Astronomical Union divided the sky into 88 constellations with precise boundaries, so that every star in the sky belongs to a specific constellation.