+The **Inner Planets** are the four [Solar System](/wiki/solar_system) planets closest to the [Sun](/wiki/sun). These terrestrial worlds – Mercury, Venus, Earth, and Mars – are primarily composed of rock and metal, residing within the [Asteroid Belt](/wiki/asteroid_belt).
+## See also
+- [Outer Planets](/wiki/outer_planets)
+- [Terrestrial Planet](/wiki/terrestrial_planet)
+- [Planet](/wiki/planet)