Our Solar System
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Our solar system consists of the Sun and everything bound to it by gravity, including eight planets, their moons, and countless smaller objects such as asteroids and comets. The four inner planets—Mercury, Venus, Earth, and Mars—are rocky and terrestrial, while the four outer planets—Jupiter, Saturn, Uranus, and Neptune—are gas giants, with Jupiter being the largest. The solar system also contains the Kuiper Belt, home to dwarf planets like Pluto, and the Oort Cloud, which is thought to be a source of long-period comets.