Solar System. Illustration of the planets of the Solar System, with the Sun at far left. The planets are shown in their order from the Sun, but the distances and sizes are not shown to scale. From left to right, they are: the four rocky planets of the inner solar system (Mercury, Venus, Earth and Mars), the asteroid belt, then the four giant planets of the outer solar system (Jupiter, Saturn, Uranus, and Neptune). Beyond Neptune is Pluto (no longer considered a planet), and beyond Pluto is the Kuiper Belt. |