Solar system Artwork of the nine planets orbiting the Sun yellow The planetary orbits are shown as blue lines Distances and sizes are not to scale In their order from the Sun the planets are Mercury Venus Earth Mars the small rocky inner planets Jupiter lower left Saturn lower right Uranus Neptune the outer gas giant planets and Pluto a small planet of rock and ice The latter three are across top The asteroid belt between Mars and Jupiter is also seen and the Milky Way the galaxy of which the Sun is a part runs down the background at right