The Zodiac is considered circular when seen from a point.
A circle from its centre is divided in 360 degrees.......simple maths.
The Zodiac is divided in 12 parts of 30 degrees each. Each part is called a sign and has its own nature.
These 12 signs can be divided in 4 categories according to elements (1) Fire (2) Earth (3) Air (4) Water.
Again every sign can be further subdivided into
decanates.....Every decanate has a quality.
There are so many dicisions, so ultimately it is not divided in 12 signs only.
All living beings are divided in 3 categories (1) female (2) Neuter (3) Male. instead of 12 categories.
Ans: There are 12 kinds of destiny roughly. Then consider the other divisions and sub divisions.
Astrology accepts 12 signs as a base; then goes deeper.
RishiRahul