The dark streaks seen near it are caused by geysers throwing up sooty debris which is then blown downwind in its thin nitrogen atmosphere. It is composed of roughly 75% rock and 25% ice and has very active internal heating. With a surface temp of 37 Kelvin it is the coldest known spot in the solar system. Slightly smaller than Europa, it also has extreme seasons as the sun can be directly overhead
The dark streaks seen near it are caused by geysers throwing up sooty debris which is then blown downwind in its thin nitrogen atmosphere. It is composed of roughly 75% rock and 25% ice and has very active internal heating. With a surface temp of 37 Kelvin it is the coldest known spot in the solar system. Slightly smaller than Europa, it also has extreme seasons as the sun can be directly overhead as far from the poles as 50 degrees North or South Latitude. Scientists assert that it was formed outside of its planet's orbit and later captured in order to explain its retrograde motion. FTP identify this largest satellite of Neptune.
The dark streaks seen near it are caused by geysers throwing up sooty debris which is then blown downwind in its thin nitrogen atmosphere.