What Are Heavenly Bodies?

Stars include small red dwarfs, even smaller neutron stars, and stars larger than the Earth's Sun. These are large, gaseous objects that emit light that can be seen in the sky. Planets come in various shapes and sizes, such as the gas giant Jupiter, ringed Saturn, water-covered Earth and rocky Mercury. Smaller items include moons, comets and asteroids. Moons are linked with planets, while comets and asteroids float more freely throughout galaxies and solar systems.