There are total 8 planets in our Solar System . Every Day Science Questions on our Solar System Smallest planet and largest planet . Each planet has two things mass and volume . So from all the planets Jupiter has more mass and volume among the other planets. Jupiter has mass of 1.898x 10 27 KGs and Volume of 1.43X1015 Cubic Kilometer . It has diameter of about 142,000 KMs. Multiple Choice Questions MCQs and Answers on Solar System General Science and Ability which is the biggest planet in our Solar System.