uranus88How many moons does Uranus have? Uranus has 27 known moons. They stand out as the least massive moon system among those of the giant planets. For example,In Greek mythology, Uranus ( ˈ j ʊər ə n ə s YOOR-ə-nəs, also j ʊ ˈ r eɪ n ə s yoo-RAY-nəs), [2] sometimes written Ouranos (Ancient Greek: Οὐρανός, lit. 'sky', ), is the personification of the sky and one of the Greek primordial