Solar System From Wikipedia, the free encyclopedia This article is about the Sun and its planetary system. For other similar systems, see Star system and Planetary system . Solar System The Sun and planets of the Solar System (distances not to scale) Age 4.568 billion years Location Local Interstellar Cloud , Local Bubble , Orion–Cygnus Arm , Milky Way System mass 1.0014 Solar masses Nearest star Proxima Centauri (4.22 ly ) Alpha Centauri system (4.37 ly) Nearest known planetary system Alpha Centauri system (4.37 ly) Planetary system Semi-major axis of outer planet ( Neptune ) 30.10 AU (4.503 billion km) Distance to Kuiper cliff 50 AU Populations Stars 1 ( Sun ) Planets 8 ( Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune ) Known dwarf planets Possibly sever...
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