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The celestial bodies that we identify as planets orbit around stars, just as the Earth circles the Sun. They do not emit light of their own, making visible only the portion that is illuminated by the stars. As a result, they are categorized as illuminated celestial bodies. In addition, they may have natural satellites, which are celestial bodies devoid of their own light and that orbit around them, as is the case of the moon, which orbits around the Earth.
