Planetary bodies refer to celestial objects in our solar system, such as planets, moons, asteroids, and comets. Research in this area involves studying the physical and chemical properties of these objects, their formation and evolution, and their interactions with each other and with the Sun. Scientists also investigate the potential for finding signs of life on these celestial bodies, as well as the possibility of one day colonizing or mining them for resources. Studying planetary bodies can help us better understand the origins of our solar system and the potential for life beyond Earth.