Celestial objects refer to any natural, physical entity that exists in space beyond Earth's atmosphere. These objects may include stars, planets, moons, asteroids, comets, and galaxies. Studying celestial objects is important in the field of astronomy, as they provide valuable insights into the composition, evolution, and dynamics of the universe. Researchers use various tools and techniques, such as telescopes, spectroscopy, and computer simulations, to study these objects and understand their properties and behavior. By studying celestial objects, scientists can also gain a better understanding of the origins of the universe and the processes that govern its evolution.