In which country did the twelve constellations first spread?

Constellations originated in Babylon, one of the four ancient civilizations, and the Babylonians put forward 30 constellations around 1000 BC. 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. After the Middle Ages, European capitalism rose and needed to expand outward, and the navigation industry was greatly developed. Ships sailing at sea need navigation at any time, and stars are the best street lamps. Among the stars, this constellation has a special shape and is the easiest to observe. Therefore, constellations have aroused widespread concern. 16 when Magellan actually sailed around the world, he not only used constellations to navigate and orient, but also studied constellations. 1922, the General Assembly of the International Astronomical Union decided to divide the sky into 88 constellations, and their names basically followed the historical names. 1928, the international astronomical union officially announced the names of 88 constellations. These 88 constellations are divided into three celestial regions, 29 in the northern hemisphere and 47 in the southern hemisphere, near the ecliptic 12.

The earliest historical records about the ecliptic appeared in Babylonian culture. They use the position of the sun on the ecliptic to determine the date. The earliest function of the zodiac is like the twelve months in today's calendar. Aries is regarded as the beginning of the year from the vernal equinox, and the day when the sun moves to Libra is equally divided between day and night.

In Babylonian times, the vernal equinox on March 2 1 day happened to be the time when the sun entered Aries. The stars behind the zodiac are not fixed, they just move at a very slow speed. We call this sport precession. Today, because of precession, the equinox on the ecliptic has moved to Pisces.

Greek astrologers have long discovered this problem, but for ancient astrologers, the starting point of vernal equinox's Aries is an important coordinate to define the position of the planet. If it keeps moving, there will be considerable trouble in determining the position of the planet. So Greek and Roman astrologers and astronomers decided to keep March 2 1 day as the vernal equinox, and vernal equinox's sun position was the starting point of Aries on the ecliptic. And this ecliptic system is called "tropical ecliptic". But Indian astrologers insist on taking Aries' star position in the sky as the starting point of the ecliptic. This calculation method of the ecliptic is called the stellar ecliptic.

Astronomy calls the annual apparent trajectory of the sun on the earth, that is, the great circle of the apparent path of the sun in the sky "ecliptic", that is, the projection of the orbital plane of the earth on the earth. The sun rotates once a year on the earth along the ecliptic. In order to determine the position, people divide the ecliptic into twelve equal parts (each part is equivalent to 30 parts), and each part is named after an adjacent constellation. These constellations are called the zodiac or the zodiac. This is equivalent to dividing a year into twelve segments, in which the sun enters a constellation. In the west, when a person is born, which constellation the sun is going to, he is said to belong to this constellation. If you were born in that constellation, you just couldn't see your constellation in the month when you were born. Because the constellation you belong to at this time is just on the back of the connection between the earth and the sun.