The rings are composed of dark particles which vary in size. Neptune has eight natural satellites , four of which orbit within the rings. The largest satellite is Triton . Due to Triton's retrograde orbit, its density , and its composition, astronomers theorize that Triton was not originally a satellite of Neptune. They theorize that Triton was captured by Neptune's gravitational pull, forcing it into an orbit around the planet.
Triton is thought to be a combination of rock and ice.
Its surface temperature is -245 degrees Celsius , and it has a thin atmosphere of nitrogen and methane. The Answer Show me the Level 1 version of this page. Show me a printable version of this page.