Solar System Milky Way Galaxy

        The Solar System [a] is a collection of celestial bodies consisting of a star called the Sun and all objects bound by its gravitational force. These objects include eight known planets with elliptical orbits, five dwarf planets, 173 identified natural satellites [b], and millions of other celestial bodies (meteors, asteroids, comets).The Solar System is divided into the Sun, the four inner planets, the asteroid belt, the four outer planets, and in the outermost are Kuiper belts and discs scattered. The Oort cloud is thought to lie in the furthest area about a thousand times beyond the outermost.Based on the distance from the Sun, the eight planets of the Solar System are Mercury (57.9 million km), Venus (108 million km), Earth (150 million km), Mars (228 million km), Jupiter (779 million km), Saturn (1,430 million km), Uranus (2,880 million km), and Neptune (4,500 million km). Since mid-2008, there are five aerial objects that are classified as dwarf planets. The orbit of the dwarf planets, except Ceres, is farther away from Neptune. The five dwarf planets are Ceres (415 million km in the asteroid belt, formerly classified as the fifth planet), Pluto (5.906 million km, formerly classified as the ninth planet), Haumea (6,450 million km), Makemake (6,850 million km) and Eris (10.100 million km).

Six of the eight planets and three of the five dwarf planets are surrounded by natural satellites. Each of the outer planets is surrounded by a planetary ring consisting of dust and other particles.