Why is Jupiter called following the star? Why is Jupiter called the year-old star in geomantic omen?

Jupiter was discovered in ancient times, and it is called the "year star". It revolves around the sun 12 years, and the land in our calendar is also 12 years, representing the life cycle of 12 zodiac signs. Jupiter is like a clock hanging in the sky, and the ancients recorded heaven and earth through its regular operation. The ancients used "year" in the calendar.

Why can old stars date? It turns out that Jupiter runs on the ecliptic, one constellation a year, in Scorpio, Ophiuchus and Sagittarius. In twelve years, Jupiter has crossed twelve zodiac signs. The zodiac signs in the sky, the earthly branches on earth, belong to the zodiac signs. These three "twelve constellations" can correspond one by one. What constellation, branch and zodiac sign you belong to can be found in the Year of the Stars. Therefore, "Year" once occupied a place in human history.

However, as astronomical observation becomes more and more accurate, astronomers point out that the period of revolution of Jupiter is not a whole 12 years, but 1 1: 862. After a long time, the calendar was inconsistent with the actual astronomical phenomena, and later the "chronology" was replaced by other calendars.