Jupiter and its rings, artwork. Jupiter is the fifth planet from the Sun and the largest in the solar system. The rings are made of fast-moving dust particles. They have a radial structure; dark, dust-free areas represent orbits which are perturbed by the gravitational influence of Jupiter's moons. Jupiter's rings are unstable, and the dust gradually falls towards the planet, constantly being refreshed by dust which probably comes from the slow disintegration of orbiting moons and moonlets.