As Neptune orbits the sun, it spins on its axis, an imaginary line through the center. Neptune's axis is not perpendicular to the planet's path around the sun. The axis tilts about 30 degrees from the perpendicular position. Neptune's dark spot is as big as Earth Eastside Neptune has gale force winds. Voyager 2 discovered that Neptune is a more violent world than Uranus.
Triton has volcanoes and they are ice volcanoes.
Neptune's moon, Triton is way farther from Neptune than Earth's moon is from Earth, by 30 times. Neptune is much bigger than Earth. Pluto is the only planet farther from the sun than Neptune. However, every 248 years Pluto moves inside Neptune's orbit for about a 20-year period during which it is closer to the sun than Neptune. Neptune's diameter is about 30,200 miles, or almost four times the Earth's diameter.