Planet sizes. Artwork showing the relative sizes of the major bodies in the Solar System. The Sun (orange) is in lower frame. Superimposed on it are the four inner (terrestrial) planets. These are, from left to right: Mercury, Venus, Earth (with the Moon to its left) and Mars. In upper frame are the four major outer (gas giant) planets: Jupiter, Saturn (its rings are not seen), Uranus and Neptune. The furthest planet from the Sun, Pluto, is seen at upper right, along with its relatively large moon Charon. Pluto is a small rocky body that orbits around 6 billion kilometres from the Sun.