Saturn's small inner moon, Enceladus, hosts massive plumes of water ice erupting from fissures in its southern hemisphere—clear evidence of a subsurface ocean beneath its thin, icy crust.
Jupiter's Callisto is the third-largest moon in the solar system, featuring deep craters that reveal fresh ice beneath, spreading bright ejecta debris across its rugged surface.
Iapetus, one of Saturn’s moons, has a striking two-toned surface and a massive equatorial ridge, giving it a walnut-like shape.
Io, the innermost of Jupiter’s four Galilean moons, is the most volcanic world in the solar system, giving it a dynamic mix of yellows, reds, and browns.
Hyperion is one of the strangest moons in the solar system, with a sponge-like surface covered in deep, dark pits and sharp ice-rimmed ridges.