Icy volcanoes burst through the frozen surface of Neptune's moon Triton, to the total surprise of scientists.
Nitrogen eruptions have been seen on Neptune's moon Triton.
Ice volcanoes were first observed on Neptune's moon Triton during a Voyager 2 flyby in 1989.
The name was later used by astronomers for a plateau on the moon Triton.
It was not about Neptune's Great Dark Spot or the surprising pink and blue colors of the moon Triton.
August 25 - Voyager 2 passes the planet Neptune and its moon Triton.
Phoebe, it turns out, is similar to bodies like Neptune's moon Triton, a captured object from far out at the edges of the solar system.
Scientists analyzing more data from Voyager 2 reported a nitrogen-rich atmosphere on the moon Triton.
The discovery of Neptune led to the discovery of its moon Triton by William Lassell just seventeen days later.
In one billion years, Neptune may develop its own rings when its moon Triton spirals from orbit and disintegrates into countless fragments.