Natural objects found outside of the Earth's atmosphere, such as planets, stars, moons, comets, meteors and asteroids, are some of the heavenly bodies in space. It is believed that there are other forms of heavenly bodies or objects in space that are yet to be discovered and explored.
Heavenly bodies are anything that are in the observable universe, bound together by gravity and are associated with their own positions in space. They are also called astronomical or celestial bodies, with celestial meaning "an inhabitant of heaven."
Interestingly, most heavenly bodies, especially the planets and natural satellites in the Solar System, are named after Roman gods. Ancient civilization also used to worship these celestial bodies, particularly the sun and the moon.