Neptune's largest moon, Triton, is one of the most biologically interesting places in the solar system. Despite being hard to reach, it appears to have active volcanoes, a thin atmosphere, and ...

As for the surface, it looks like a cantaloupe. A large chunk of Triton's midlatitudes is covered in bumpy, wrinkly features nicknamed, appropriately enough, cantaloupe terrain.

We recently examined how and why Saturn's icy moon, Enceladus, could answer the longstanding question: Are we alone? With its interior ocean and geysers of water ice that shoot out tens of ...