How Many Moons Are There in the Solar System? 태양계에는 몇 개의 위성이 있습니까? How Many Moons Are There in the Solar System? The "traditional" moon count most people are familiar with stands at 290: One moon for Earth; Two for Mars; 95 at Jupiter; 146 at Saturn; 27 at Uranus; 14 at Neptune; and five for dwarf planet Pluto. According to NASA/JPL's Solar System Dynamics team, astronomers have documented more than 460 natural satellites orbiting smaller objects, such as aster..