Is the origin of the twelve constellations abroad? When did it start? And now twelve constellations have become thirteen constellations?

Constellation originated in Babylon, one of the four ancient civilizations. The Babylonians divided the sky into many regions and called them "constellations", but at that time constellations were of little use and were rarely found and named. The constellation 12 on the ecliptic was originally used to measure time, not to express people's character as it is now. Around 1000 BC, 30 constellations have been proposed. The Tigris River and the Euphrates River flow into the Persian Gulf from northwest to southeast, so it is also called the "two river basin" area.

After the culture of the two river basins spread to ancient Greece, it promoted the cultural development of ancient Greece. Ancient Greek astronomers supplemented and developed the Babylonian constellation and compiled the ancient Greek constellation table. In the 2nd century A.D., Ptolemy, an ancient Greek astronomer, synthesized the astronomical achievements at that time and sorted out 48 constellations. Connect the main bright stars in the constellation with imaginary lines, imagine them as images of animals or characters, and give them appropriate names in combination with fairy tales. This is the origin of the constellation name. Most of the 48 constellations in Greek mythology live in the northern sky and north and south of the equator.

2. In fact, there are 88 constellations in the whole celestial sphere, and there are not only 12 constellations on the ecliptic, but also 13 constellations. Strictly speaking, there are 14 constellations. Besides the familiar twelve constellations, the other two are Pisces and Ophiuchus. In fact, these two constellations only occupy a small part in the actual position of the ecliptic, unlike the other twelve constellations, almost all of them are included in the ecliptic.

Fourteen constellations, or thirteen constellations, are actually phenomena observed in astronomy and have nothing to do with the twelve constellations in astrology. Now some people say that the birthday of the constellation ranking changes because of what axis of the earth has changed. This has nothing to do with astrology, so don't worry.