Tropical Astrology is the old astrological division of the sky.
When the Zodiac was invented, the position of the constellations
were written down. But since then, the whole Zodiac has shifted
almost a whole sign due to the Precession, so whoever was once
born a Virgo, is now probably born a Leo - with the personality
changes that come with it. Tropical Astrology ignores this, and
keeps using the old tables - which have nothing to do with where
the planets actually are in the sky. Sidereal Astrology
acknowledges the problem with the shifting signs, but digs
itself deeper into the ludicrous: The more sidereal astrologers
try to follow the real division of the sky, the more they are
distancing themselves from the old wisdom. Sidereal astrologers
cannot claim to build on ancient knowledge, but have to change
the signs and characteristics over time. They are in turn making
the whole concept of Astrology invalid. The real astronomical
signs are a few days off from the Sidereal system by now - so
not even Sidereal