Ocean Worlds

Jupiter's moon Callisto has an ocean beneath an ice layer that is 200 km deep.

Enceladus is a tiny moon of Saturn that spews seawater out of jets at the south pole. It is believed to have hydrothermal vents in its ocean.

Europa is a Jovian moon that has a liquid water ocean and may have hydrothermal vents. The Europa Clipper mission will be the first to visit an ocean world in the outer Solar System.

Ganymede is the largest moon in the Solar System. It is a moon of Jupiter. It likely has a water ocean and layers of ice.

Titan is a moon of Saturn with a complex salty ocean filled with hydrocarbons and ices. It has a thick hazy atmosphere.

Pluto is an ocean world with mountains of ice and evidence of a subsurface ocean.

Mimas is a moon of Saturn. It is mostly water ice and has a very large impact crater; thus, it's nickname is the "Death Star" moon.

Neptune's moon Triton orbits in the opposite direction of the planet's rotation. It has a thin atmosphere and may be a captured Kuiper Belt object.

Earth is the OG Ocean World. More than 70% of the surface of our planet is covered in liquid water, a known requirement for life.