The Solar System consists of the Sun and the other astronomical objects gravitationally bound to it: the nine  ( now 8 ) planets, their 166 known moons, three dwarf planets (Pluto, Ceres, and Eris and their 4 known moons), and billions of small bodies. Small bodies include Kuiper belt objects, comets, asteroids, meteoroids, and interplanetary dust.

The terrestrial planets are (in order of distance from the sun):
• Mercury
• Venus
• Earth
• Mars

The outer gas giants are:
• Jupiter
• Saturn
• Uranus
• Neptune

The three dwarf planets are
• Ceres
• Pluto
• Eris