Planetary System
A planetary system is a group of celestial bodies that orbit around a star. It consists of planets, dwarf planets, moons, asteroids, comets, and other space objects that are bound to the star's gravitational pull. The study of planetary systems involves understanding the formation, evolution, and dynamics of these celestial bodies. Planetary systems are believed to form from a protoplanetary disk, a rotating disk of gas and dust that surrounds a young star. The gravitational forces between the particles in the disk cause them to clump together, eventually forming planets and other objects. The study of planetary systems is important for understanding the origins of our own solar system and the potential for life on other planets.
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