How many star domains have been divided in astronomical research?

Divided five star domains and 88 constellations for astronomical research.

1928, the international astronomical union officially announced 88 constellations commonly used in the world, and at the same time stipulated that vernal equinox and the equator in 1875 should be taken as the benchmark. ?

According to the different positions of 88 constellations on the celestial sphere and the appearance of stars, they are divided into five regions. That is, there are five Arctic constellations, twelve ecliptic constellations (12 constellations near the ecliptic on the celestial sphere), 10 ecliptic constellations, 42 Antarctic constellations, and 19 Polaris constellations.

Historical origin

In ancient times, in order to identify the direction and observe the sky, the scattered stars in the sky were connected by imagination. Half of these constellations were named in ancient times.

Its naming method is attached to the myths and forms of ancient civilizations (including the myths and epics of Mesopotamia, Babylon, Egypt and Greece). The other half (mostly in the night sky in the southern hemisphere) was named only in modern times, and is often named after navigation instruments.