This solar system diagram includes terrestrial planets and asteroid belts. This region is primarily composed of silicates and metals. This solar system diagram has bodies closer to the sun than other regions. This inner solar system is defined by its proximity to the sun, which is less than 5 AU. The four inner planets are rocky and lack a ring. As a result, they may or may not have moons. Mercury, Venus, Earth, and Mars are the four planets. The Earth is one of eight planets depicted in the solar system diagram. Aside from planets, there are moons and dwarf planets such as Pluto and thousands of asteroids, meteoroids, and comets.
