A planetary system is a collection of celestial bodies, including planets, moons, asteroids, comets, and other objects, that orbit around a central star. Our own solar system, which includes the Sun and all of its orbiting planets, is a well-known example of a planetary system. Researchers study planetary systems to understand how these objects form, evolve, and interact with each other. This research can provide insights into the origins of our own solar system, as well as shed light on the potential for habitable planets and the search for extraterrestrial life. One of the key goals of studying planetary systems is to answer fundamental questions about the formation and evolution of planets, moons, and other celestial bodies, as well as the conditions necessary for life to exist. Scientists use a variety of techniques, such as observing exoplanetary systems, studying the composition of planetary bodies, and modeling the dynamics of orbits, to explore these questions.