Satellites · Updated October 2026
Moons of the solar system.
The planets have 456 confirmed moons between them (JPL, October 2026), and Pluto has five more. This page covers the named major moons — the ones with their own pages here. Pick a parent body to see its moons, or jump straight into the 3D viewer to watch them orbit in real time.
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Earth
Mars
Jupiter
- Io Io is the innermost of Jupiter's four Galilean moons and the most volcanically active body in the solar system.
- Europa Europa is the smallest of Jupiter's four Galilean moons at 3,122 km diameter, just smaller than Earth's Moon.
- Ganymede Ganymede is the largest moon in the solar system, with a 5,262 km diameter, bigger than the planet Mercury, though only 45% as massive.
- Callisto Callisto is the outermost Galilean moon and the third-largest moon in the solar system at 4,821 km diameter.
Saturn
- Titan Titan is Saturn's largest moon and the second-largest moon in the solar system at 5,150 km diameter.
- Enceladus Enceladus is a small icy moon of Saturn, just 504 km across, that sprays plumes of water ice into space from giant fissures near its south pole.
- Rhea Rhea is Saturn's second-largest moon at 1,527 km diameter, an icy body with a heavily cratered surface and a very thin exosphere of oxygen and carbon dioxide.
- Dione Dione is one of Saturn's mid-sized icy moons, 1,123 km across.
Uranus
- Miranda Miranda is the smallest of Uranus's five major moons at just 472 km across, but its surface has some of the most extreme terrain in the solar system: three ridged "coronae" found nowhere else, fault canyons up to 12 times as deep as the Grand Canyon, the long scarp of Verona Rupes, and chaotic juxtapositions of old and young surface..
- Ariel Ariel has the brightest surface of Uranus's five large moons and is one of the larger ones at 1,158 km diameter.
- Umbriel Umbriel is the darkest of Uranus's major moons, with the lowest reflectivity and the oldest, most heavily cratered surface among them.
- Titania Titania is the largest moon of Uranus at 1,578 km in diameter, about half the size of Earth's Moon.
- Oberon Oberon is the second-largest moon of Uranus at 1,523 km diameter and the outermost of its major moons.