Satellites · Updated October 2026
Moons of the solar system.
The solar system has more than 290 confirmed moons. 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 5,268 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 thin oxygen-carbon-dioxide exosphere — the first detected around any moon of the outer solar system..
- 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: corrugated patterns, 20-km-tall cliffs at Verona Rupes (the tallest known cliff anywhere), and chaotic juxtapositions of old and young surface..
- Ariel Ariel is the brightest of Uranus's moons and 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.