Moons

Moon

Europa Jupiter's ice-shelled moon hides an ocean with twice the water of all Earth's seas.

Moon

Titan Saturn's giant moon, and the only world besides Earth with rain, rivers, lakes and seas.

Moon

Enceladus The little moon that leaks its ocean into space. Free samples included.

Moon

Ganymede The largest moon in the Solar System is bigger than Mercury and has its own magnetic field.

Moon

Io The most volcanic world in the Solar System. Io is turning itself inside out.

Moon

Callisto An ancient, quiet moon with a possible hidden ocean, and the most cratered world in the Solar System.

Moon

Triton A kidnapped Pluto with erupting nitrogen geysers, circling Neptune backwards.

Moon

Charon Half the size of Pluto itself, this giant companion makes the pair the Solar System's great double act.

Moon

Phobos Mars's doomed potato moon is spiraling slowly toward destruction.

Moon

Deimos Mars's tiny outer moon is a drifting lump the size of a city.

Moon

Rhea Saturn's second-largest moon, an ancient ice ball with a whisper of oxygen.

Moon

Iapetus Saturn's two-faced moon: coal-black on one side, snow-white on the other.

Moon

Dione A cracked ice world that may hide a deep buried ocean.

Moon

Tethys An ice moon scarred by a crater nearly half its own width.

Moon

Mimas The 'Death Star' moon is hiding a shockingly young ocean.

Moon

Hyperion The Solar System's most chaotic moon is a tumbling sponge of ice.

Moon

Miranda Home to the tallest cliff known, Miranda is Uranus's patchwork moon.

Moon

Ariel The brightest and youngest face among Uranus's moons.

Moon

Titania Uranus's largest moon has canyons, frost, and a possible hidden sea.

Moon

Oberon Old, dark, and barely explored, Oberon is the outermost of Uranus's great moons.

Moon

Proteus Neptune's lumpy dark moon, as big as a world can be without turning round.