Celestial bodies are natural objects found in space. They include a variety of entities such as planets, stars, moons, asteroids, and comets. These objects can vary greatly in size, composition, and behavior. For example, planets like Earth and Mars orbit around stars like the Sun. Many celestial bodies are part of larger systems, such as solar systems or galaxies. Galaxies are vast collections of stars, gas, and dust, while solar systems consist of a star and the celestial bodies that orbit it. Understanding these objects helps scientists learn more about the universe and its formation.