When did the twelve constellations come?

Constellation is calculated according to the Gregorian calendar (new calendar \ solar calendar) birthday.

There is such a translation in the English-Chinese dictionary: "symbol"

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The zodiac "Zodiac" has the same free translation in English and Chinese astronomical vocabulary; The description in Ying Ying's dictionary is: "One.

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The zodiac "means" the zodiac is divided into twelve equal parts ". So the twelve constellations are the actual dates of the twelve constellations according to the astronomical calendar.

Extended data

Constellation refers to the "sun constellation"; That is, people on the earth are the center, and at the same time we can see which constellation is in the orbit (Greek zodiac: the circle made by animals, also known as the "zodiac"), so we can see what constellation this person is. In fact, the origin of this constellation is different from that of the West and the East, and the arrangement of the lunar calendar is also different. More than 2000 years ago, the Greek astronomer Hipparchus (190 ~ 120 BC) divided the ecliptic into 12 segments, with the spring divided into 0 and the equinox at intervals of 30 (that is, 0).

It is a palace named after the main constellations contained in each palace at that time.