Why are sun sign dates different than when the Sun is actually in the constellation?

http://en.wikipedia.org/wiki/Sidereal_as鈥?/a>


If you look at the chart in the above link, you will see three different date columns: tropical, sidereal, and sun is in constellation. Why don't we go by when the sun is in the constellation?|||Because a constellation and a zoidia (zodiac sign) are two totally different concepts. The difference between tropical and sideral is where they start the zodiac. Tropical starts the sign of Aries off at the Spring Equinox; Sidereal is based on the stars of the constellations. But both are only using it as a starting point: a zodiac sign is 30 degrees, most constellations are not equal in length. The constellations share names with the zodiac signs, but they are two different things.





We do astrology from our perspective here on Earth: Astrology is geocentric. Yes, astrologers do know that the solar system is heliocentric, but astrology is about symbolism and perspective. The zodiac is an imaginary band that encircles the Earth and is divided into 12 equal sections. It's these 12 slices of the sky that are important for astrological interpretation.|||I haven't looked at the link but I am guessing from the word sidereal in the address that the chart you where looking at was a sidereal chart which is a different system than the one that is generally used in the west.


The difference is about 26 degrees, so if you take each planet and move it forward about 26 degrees you will get the topocentric positions.|||owing to the precession of the equinoxes





the sun and other planets are not at points that they were found over 2000 years ago





when the current zodiac was conceived





thus the mismatch and





astrologers erroneous calculations