OverviewDefinitionFormation and evolutionGeneral characteristicsSunInner Solar SystemOuter Solar SystemTrans-Neptunian region
The Solar System includes the Sun and all objects that are bound to it by gravity and orbit it. The International Astronomical Union describes the Solar System as all objects that are bound by the gravity of the Sun, the Sun itself, its eight planets, and the other celestial bodies which orbit it. NASA describes the Solar System as a planetary system, including the Sun and all objects that orbit it. Capitalization of the name varies. When not used as a proper noun and written without capitalization, "
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