Ordinary water ice on Enceladus's cold surface would be as hard and strong as rock. Triton, a satellite of Neptune, is the coldest body in the solar system. This moon is half rock, half ice. Its core is silicate rock. Its surface consists of ices made of water, nitrogen, methane, carbon dioxide, and carbon monoxide.
Triton has few craters.
Sheets of ice cover a surface broken by geysers of boiling nitrogen that erupt several miles or kilometers into the air. There is a thin nitrogen atmosphere. Strong winds carry small, dark particles away from the geysers, streaking Triton's icy surface. Triton orbits in the opposite direction from most objects in the solar system. This moon may have achieved its odd orbit by forming as an independent object, then being captured by Neptune's gravity.