Triton: Neptune’s Captured Moon

Triton is Neptune’s largest moon and the seventh-largest moon in the solar system.
It orbits Neptune in a retrograde direction, opposite the planet’s rotation.
This unusual orbit suggests Triton was captured from the Kuiper Belt.
Triton has a very cold surface, averaging around –391°F (–235°C).
Despite the cold, it has active geysers that shoot nitrogen gas into space.
Its thin atmosphere is mostly nitrogen with a trace of methane.
The surface is a mix of frozen nitrogen, water ice, and carbon dioxide ice.
Voyager 2 revealed strange “cantaloupe terrain” unique to Triton’s icy crust.
Triton may have a subsurface ocean beneath its frozen exterior.
Scientists think Triton could eventually spiral inward and break apart, forming rings around Neptune.