Celestial bodies refer to natural objects that exist in space, such as stars, planets, moons, comets, asteroids, and galaxies. Research on celestial bodies includes studying their composition, structure, formation, evolution, and interactions with each other. Astronomers use telescopes, satellites, and space probes to observe and study these objects to learn more about the universe and how it functions. Understanding celestial bodies helps scientists answer fundamental questions about the origin of the universe, the formation of solar systems, and the potential for extraterrestrial life.