solar system
US /ˈsoʊ.lər ˌsɪs.təm/
UK /ˈsoʊ.lər ˌsɪs.təm/
1.
the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
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Our solar system is part of the Milky Way galaxy.
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Scientists are constantly discovering new things about the solar system.