Astronomically speaking, there is only "ecliptic", and these three terms have opened my eyes, hehe.

Baidu searched these three concepts, but found no such concept as "the celestial star of the ecliptic". Even if it did, it was not universal, so I won't delve into it. The first two concepts have found relevant information, as follows:

"About the first century BC, Greek astrologers and astronomers decided to keep the position of the sun at the equinox on March 21st every year as the starting point of Aries on the ecliptic (at this time, the equinox and the position of the sun were already close to the position of Pisces on the ecliptic), and maintained the Babylonian way. From this point on, the ecliptic is divided into twelve equal parts, maintaining the original naming, that is, such a ecliptic system is called "returning to the ecliptic" (Tropical? zodiac）。

However, astrologers in India use different concepts. They insist on taking the position of the star in Aries in the sky as the starting point of the ecliptic, and this calculation method of the ecliptic is called "stellar ecliptic". Zodiac), the concept of these two different ecliptic systems is the so-called "Zodiac divergence" (Zodiac? Diverge）。”

Maybe it's a little abstract for the landlord, but it's not for me. To put it bluntly, the ecliptic is still the ecliptic (the trajectory of the sun running on the celestial sphere). The difference is only vernal equinox (starting point). The former takes vernal equinox (near the boundary between Aries and Pisces) as the starting point, while the latter takes vernal equinox (near a star in Aries) as the starting point. According to these two different standards, the longitude of the celestial body will differ by a constant.

Based on this, I can guess that the position of vernal equinox is the starting point of the satellite ecliptic. There is no relevant evidence to support it, but it is theoretically possible.

no matter what the concept of the ecliptic is. I can already answer the landlord's question. The purpose of astrology is to return to the ecliptic. Take the boundary between Aries Palace and Pisces Palace as a year of vernal equinox. These three concepts are nothing more than playing with some trivial skills to make people sound professional.