How many levels are there in the constellation _ How many levels are there in the constellation?

Constellations are divided according to the position and brightness of constant stars on the celestial sphere. At present, the widely used constellation is based on the 12 constellation set by the ancient Greeks. They are called the zodiac, which is consistent with the zodiac. Each constellation represents a specific time period, which is related to the movement of the twelve constellations in western astrology.