According to Vedas and Shastras there are many planets & stars but only Nine (Nav=9) Planets (Grah) and 27stars that fell into immediate circumference of the solar system and are likely to affect our lives depending upon their position in our natal chart are considered. navagraha
These nine planets form an orbit called as Navagraha Mandal.
The nine “grahas” or planets in our horoscope control our karma, our desires and their outcomes. Each of these nine planets exerts an influence in our lives, which is called “dasa” and it can be known from one’s horoscope. Navagraha Shanti puja is undertaken to reduce the pessimistic effects and improve the optimistic energies related to a person.
Navagraha Shanti puja The nine planets have special kshetras ( place of worship ) in South India. Most of them are concentrated near the Thanjavur district. Navagraha puja will be helpful, when the concerned planet dasa or sub-dasa is in operation or if the planet is associated with malefics or is in the 3rd, 6th, 8th, or 12th house.
Also as said earlier only 9 planets and 27 stars are considered.
Let us study some of the basic properties of these planets.
Within this Navagraha Mandal (the orbit formed by 9 planets) exist seven gods viz:
Ganesha, Durga, Vaayu, Aakash, Ashwini, Kshetrapaal and Vaastoshpati.
Enclosing this Navagraha Mandal there are another ten gods called Dashadik-Paalak.
Enclosing Dashadik-Paalak is the set of lord that signifies our nature, which are classified as Satva Guna , (Kindheartedness) Rajoguna (Obsessive ness)andTamoguna (Rowdiness, Ruthless, Wickedness).