The stars have been looked at for information since the Babylon period. 12 constellations in the sky, representing the 12 months gave rise to 12 zodiac signs. These signs are also associated with the different planets. Each sign occupies a sector of the sky which makes up 30° of the ecliptic.
Astrology has 2 branches- Western astrology and Vedic astrology. While Western Astrology uses the Tropical Zodiac to determine your particular zodiac sign, Vedic Astrology uses Sidereal Zodiac. Hence, when consulting an astrologer, you should know which system they follow.
In Western Astrology, on the basis of the path the Sun follows in the sky, the following 12 Zodiac Signs have been established-