Funny, but this is equivalent to "Mathematics for Astrologists":
2+2 => You are a pair number.
Astrology is much more detailed and permutation-dependant than this.
2+2 => You are a pair number.
Astrology is much more detailed and permutation-dependant than this.
Your sign depends on the each of the planet's position towards the earth sky and towards each other. So two people born on the same day in different years will have vastly different horoscopes.