Why do people use stars as signs?

Some believe the stars are spirits and have the power to give us advice and guide us through life. There are 12 star signs; Aries March 21 - April 1, Taurus April 20 - May 2, Gemini May 21 - June 20, Cancer June 21 - July 22, Leo July 23 - August 22, Virgo August 23 - September 22, Libra September 23 - October 22, Scorpio October 23 - November 21, Sagittarius November 22 - December 21, Capricorn December 22 - January 19, Aquarius January 20 - February 18, and Pisces February 19 - March 20. How ever that is the basic zodiac In the real zodiac there are 3 types of each sign all depending on the ten day period you are born These are called decans and they start at around the 20th of the month-start of the sign And they are as follows-1st decan 20-30 secound 1-10 of -next month then 3rd 11-20 You are the pure sign if in the 1st decan If born in the 2nd your a blend of another sign And if born in 3rd you are also a blend of an additional sign To study this whole 36 sign zodiac consult a book on decan astrology