There are twelve stars in ancient astronomy in China and twelve constellations in the west. Why are they all twelve? Is the understanding of the two civilizations the same or the fusion after communic

There are twelve stars in ancient astronomy in China and twelve constellations in the west. Why are they all twelve? Is the understanding of the two civilizations the same or the fusion after communication? There is no evidence that China and ancient Greece had such a profound cultural exchange when they established a systematic astronomical system. For example, China knew that the Roman Empire was still in the Eastern Han Dynasty. Just look at the obscure names, we can know that the formation time of the twelve stars is definitely much earlier than that of the Eastern Han Dynasty. Therefore, it should be recognized that they are formed independently.

In fact, this is no coincidence, because there is a star whose name is Jupiter. The period of revolution of Jupiter is 1 1.86 years, which is about 12 years around the ecliptic. And the brightness is extremely high, as long as there are stars, it will be forced out all day. Because it is an extraterrestrial planet, it can be seen all night before and after the eclipse, so it will naturally have a quite high status. For example, we call it Tai Sui, and ancient Greece was named after Zeus. Therefore, Jupiter guards a constellation every year, so it is natural to divide the ecliptic into twelve parts to describe the position of Jupiter to commemorate it.

In addition to the familiar 12, there is actually another coincidence that is 28. The reason why the stars in China and India say it is 28 nights is similar-Saturn and the Revolutionary Guard period had one night every year, which lasted for 28 years. However, Saturn is far less bright than Jupiter, so the use of 28 nights is not as common as decimal.