Sun, the heart of the solar system, and a fireball of burning gases. The gravitational force of the sun is the basis for the existence of the solar system. The smallest objects to the largest planets continue to traverse in their orbits only due to the force of the sun. Almost 99.8% of the size of the solar system is of the sun. Our earth, other planets, and members of the solar system form only 0.2% of the solar system. Though the sun is considered a giant star by us due to its proximity, it is indeed not that big compared to other stars. Though the sun is a hero for us with eight planets orbiting around it, there are billions of similar stars in the Milky Way galaxy of which our solar system is a part.