Planetary composition is the study of the materials and elements that make up the different bodies in our solar system, such as planets, moons, asteroids, and comets. Scientists analyze the chemical makeup, structure, and physical properties of these celestial bodies to better understand their formation, evolution, and geological processes. This research area also aims to provide insights into the potential habitability of other worlds and the origins of life in the universe. By studying planetary composition, scientists can learn more about the history and diversity of planetary bodies in our solar system and beyond.