This information comes from someone whom I've known for some time now, whom I trust, and who works for a major Astrology Website (The Astrologer, Inc.) What it boils down to is that "new science" has discovered what astrologers have always known and have taken into account for. Your birth sign isn't really changing! Please read:
Astrologers have known about this for millennia. Seriously, millennia. Aristarchus of Samos noticed it back in 280 BCE. What happens is that due to a wobble in the Earth’s orbit our relationship to the ...zodiacal constellations is in a constant shift. Our main point of reference here is what we call the Equinoctal Point, that is the point on the zodiac where the Sun is at the second of the spring equinox, typically on March 21, but with leap years and depending on what time zone you’re in it could be the 20th. That particular point has been sliding backwards at such a slow rate that it makes a full cycle every 26,000 years.
For the many year...s before that astrologers had been noticing planetary motion and developed the system of signs. As with any developing body of knowledge they would slowly revise their descriptions of the signs as changes became evident. And the nature of the signs would change over the years to match the shift in stellar positions. Actually some astrologers still do that. They are called “sidereal astrologers” and siderealism is practiced rather little in the West, but it’s very big in India where the system is called Jyotish, or Vedic Astrology. In the west we generally prefer the “Tropical Zodiac”
Behind the “Tropical Zodiac” is the idea that the Zodiac of Signs is different from the Zodiac of Constellations. Building on Aristarchus’ discovery of the Precession, Hellenic astrologers figured that we are dealing with a system of interacting planets, the Moon and Sun. The stars are markers that drift, but our main points of reference are not directly the stars. They are the equinoxes (both spring and vernal) and the solstices which altogether make the four cardinal points of the zodiac which in turn determine the signs. The stars help us locate those points which define the SIGNS of the Zodiac which remain constant in relation to the equinox point. The CONSTELLATIONS do move about and we take that into consideration when locating planets.
This may be a bitter disappointment to people who don’t like their signs and thought they had a chance to change them. No sign is better or worse than any other. Each has its own strengths and weaknesses. A better approach would be to find a good astrologer who can tell you what your sun sign and the rest of your chart really are good for.
Astrologers have answered this one so many times we can only suspect that the astronomers who repeat this canard are being intellectually dishonest. At the very least, if Professor Kunkle were really just discovering the precession of the equinox he should have the integrity to ask an astrologer, hey, do you know about this and how do you deal with it? Acting like you have all the answers without doing even that much research is just really bad science.
(Thank you Sean Kelley, Kelli Fox, and The Astrologer Inc website)!