The positions of the nine planets - Surya (sun), Chandra (moon), Mangal (Mars), Budha (Mercury), Bruhaspati (Jupiter), Shukra (Venus), Shani (Saturn), Rahu (north lunar node), and Ketu (south lunar node) - have uncertainties from birth, which can have a negative impact on an individual's life. So to reduce the effect and overcome all the issues a person has to perform Navgrah Shanti Puja.