Animation showing the relative sizes of the Earth and Saturn. Earth has a diameter of some 12,742 kilometres, making it the largest of the rocky terrestrial planets. Saturn is a gas giant, 9.5 times Earth磗 width, with a diameter of 120,500 km. Saturn has an extensive ring system composed of highly_reflective chunks of ice, with the main rings extending 80,000 kilometres above the equator. Saturn orbits the Sun at a distance of some 1.5 billion kilometres, ten times the Earth_Sun distance.