When did the constellation come into being?

There are only twelve constellations in astrology, and the specific dates are as follows:

1, Aries: March 21~ April 19

2. Taurus: April 20th to May 20th.

3. Gemini: May 2 1 ~ June 21.

4. Cancer: June 22nd to July 22nd.

5. Leo: July 23rd to August 22nd.

6. Virgo: August 23rd to September 22nd.

7. Libra: September 23rd ~ 65438+1October 23rd.

8. Scorpio: 65438+1October 24th ~165438+1October 22nd.

9. Sagittarius:165438+1October 23rd ~ 65438+February 2nd1.

10, Capricorn: 65438+February 22 ~ 65438+ 10/9.

1 1, Aquarius: 65438+1from October 20th to February 18.

12, Pisces: February19 ~ March 20th.

Extended data

Origin of Constellation: In ancient navigation, in order to identify the direction and observe the astronomical phenomena, the scattered stars in the sky were connected by imagination, and half of them were named in ancient times, and their naming methods were attached according to the myths and shapes of ancient civilizations.

The other half was named only in modern times, often named after navigation instruments. In ancient times, because of different regions, the way of "Lianliankan" was different! 2 1 century, the world unified the constellation map and divided the sky into 88 regions and 88 constellations.

The "constellation" we usually say refers to the "sun constellation"; In other words, people on the earth are the center, and we can see which constellation the sun is in orbit, so we can say what constellation that 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.

Baidu encyclopedia-twelve constellations