Moons of the Solar System
Discover the fascinating natural satellites orbiting our planets.
Callisto
Callisto is the most heavily cratered object in the solar system. Its ancient surface tells the story of the solar system's violent history.
- Diameter:
- 4,820 km
- Period:
- 16.69 days
Europa
Europa is an icy world that hides a global ocean beneath its frozen crust. It is considered one of the most promising places in the solar system to search for life.
- Diameter:
- 3,122 km
- Period:
- 3.55 days
Ganymede
Ganymede is the largest moon in the solar system, even bigger than the planet Mercury. It is the only moon known to have its own magnetic field.
- Diameter:
- 5,268 km
- Period:
- 7.15 days
Io
Io is the most volcanically active body in our solar system. Caught in a gravitational tug-of-war, its surface is constantly being reshaped by massive lava flows.
- Diameter:
- 3,642 km
- Period:
- 1.77 days
Phobos
Phobos is the larger and closer of Mars' two moons. It is a small, irregularly shaped body that is slowly spiraling toward Mars and will eventually be destroyed.
- Diameter:
- 22.2 km × 21.6 km × 20.6 km
- Period:
- 0.32 days
Triton
Triton is Neptune's largest moon and the only large moon in the solar system with a retrograde orbit. It has cryovolcanoes and may have a subsurface ocean.
- Diameter:
- 2,707 km
- Period:
- -5.88 days
Charon
Charon is Pluto's largest moon and forms a binary system with Pluto. It has a dark red polar region and may have had cryovolcanic activity in the past.
- Diameter:
- 1,212 km
- Period:
- 6.39 days
Enceladus
Enceladus is a small, icy moon that erupts geysers of water vapor and ice particles from its south pole. It may harbor a subsurface ocean beneath its frozen surface.
- Diameter:
- 504 km
- Period:
- 1.37 days
Mimas
Mimas is a small moon of Saturn famous for its large Herschel Crater, which makes it resemble the Death Star from Star Wars.
- Diameter:
- 396 km
- Period:
- 0.94 days
Titan
Titan is Saturn's largest moon and the only moon in the solar system with a substantial atmosphere. It is larger than Mercury and has liquid lakes on its surface.
- Diameter:
- 5,150 km
- Period:
- 15.95 days