What is the constellation? 、、、

Refers to the stars in the sky. In the three-dimensional universe, these stars are not actually related to each other, but in fact, the position of the celestial sphere on the surface of the spherical shell is similar. Since ancient times, people have been interested in the arrangement and shape of stars, and naturally linked some stars with similar positions to form constellations.

Constellations play an important role in astronomy; Astrology also uses images of the zodiac 12, but astronomers regard astrology as pseudoscience without using real scientific methods.

Basically, dividing stars into constellations is a random process. Different civilizations have different constellations made up of different stars-although some constellations made up of more conspicuous stars are roughly the same in different civilizations, such as Orion and Scorpio.

The International Astronomical Union divides 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 the ancient Greek traditional constellations handed down from the Middle Ages.

In order to identify the stars easily, people divided several regions according to their natural distribution in the sky. Different sizes. Each region is called a constellation. Connect the bright stars in the same constellation with lines to form various figures. According to their shapes, they are named after similar animals, vessels or mythical figures, such as Cygnus and Andromeda. The stars in each constellation are arranged in lowercase Greek letters according to brightness, such as Ursa Major α and Ursa Major β.

Constellation is the sum of celestial spaces in an area projected on the celestial sphere. So such a constellation is not accurate inside/outside the Milky Way.