The term "Sonnensystem" refers to the solar system, which is a collection of celestial bodies bound by gravity. It includes the star Sonne (the Sun) at its center, along with eight major planets, their moons, dwarf planets like Pluto, and countless smaller objects such as asteroids and comets. The solar system is located in the Milchstraße (Milky Way) galaxy. The eight planets in the Sonnensystem are Merkur (Mercury), Venus, Erde (Earth), Mars, Jupiter, Saturn, Uranus, and Neptun (Neptune). Each planet has unique characteristics, such as size, composition, and atmosphere. The solar system formed about 4.6 billion years ago from a rotating disk of gas and dust.