The mass of the Sun alone makes up 99% of the mass of the entire Solar System: the planets are like crumbs respect to our star. In addition to this, these particles orbit around the Sun at enormous distances respect to their own size. Since they are not stars, planets cannot produce their own light, but only reflect it. Some appear to be the brightest objects in the sky after the Moon and are visible even at dawn and dusk when the sky is not dark.
Planets are often accompanied by satellites, or moons, bodies that rotate around them and with which they form a single structure that revolves around the Sun. Moreover, the bigger planets have a ring system, probably the remains of satellites that in ancient times disintegrated and that the force of gravity has kept suspended around the planet.
