posted January 28, 2014 11:25 AM
Interesting conversations coming up about rulerships. Most people think of ruling planets as "reigning over" signs, but rulership really refers to "measurement" as in one sign "measured by" a planet. So there is this whole connotation that only one planet, (or two at most) can be a perfect match for a sign.
[in analogy, This is like using inches and centimeters, you really have to understand the essence of each system for the numbers to make sense in a practical way when you switch between systems. Both systems give you an understanding of point 1 compared to point 2 but they are described or measured differently, using different pattern or type of measurement.
Example: If you grow up learning metric system and somebody tells you it's 32 degrees you are not going to feel a chill to the bones like you would if you were to relate this to the Fahrenheit system.]
So there needs to be some sort of astrological principle, or pattern, like an archetype, to measure the planets and signs to each other. When you understand the principles you understand the nature of the planets or signs.
The way the planets traditionally measure signs is by the mathematical distance of their calculated orbit around our sun in a circular path, in alignment with sacred geometry proportions. As new planets were discovered, joint rulerships came into play, but as far as science knows, there aren't enough new planets to give joint rulership mathematically to all the signs. [Pluto is technically not even a planet and when you look at its orbit, only common sense would show this - there is a youtube video by the scientist to debunked Pluto as a planet when he discovered the largest object beyond Pluto, Eris, and so he designates both as Kuiper Belt objects. But I'm not trying to argue Pluto here, as all orbiting objects are important in astrology.]
The point is, that all of our planets and signs have mates, based on their location in the sky and reigning (measuring) principles. This doesn't mean that signs cannot be influenced strongly by another planet or planetary body discovered in the future.
How do the rulerships actually work? If you are interested in coming up with your own idea, here is one theory to consider based on mathematics:
Mates=planets that share co-rulers and astrological principles
Leo-Cancer, Leo ruled by Sun, Cancer by Moon; individual principles at the core
Virgo-Gemini, Virgo ruled by mercury, Gemini by mathematically missing planet "Z"; social principles at the core (if and when planet Z is discovered we will have a more complete measurement of Gemini)
Libra-Taurus, Libra ruled by Venus, Taurus by mathematically missing planet "Y"; family principles at the core (if and when planet Y is discovered we will have a more complete measurement of Taurus)
Scorpio-Aries, Scorpio ruled by Mars, Aries by Pluto; also family principles at the core
Sagittarius-Pisces, Sag ruled by Jupiter, Pisces by Neptune; social principles at the core
Capricorn-Aquarius, Cap ruled by Saturn, Aquarius by Uranus; individual principles at the core
Just one idea to think about, but nothing is set in stone.
My own theory is that there exists a mix of many different astrological explanations and interpretations and when each system is used in context of its own measurement system it works the way it is intended.