The Windiest Planet
Neptune is the fourth largest planet in our solar system. About 60 Earths could fit inside it. Neptune is named for the Roman god of the sea.
WHAT'S IT LIKE ON NEPTUNE?
Neptune gets its blue color from a layer of methane gas above the clouds. Methane absorbs red light so only blue colors show up when we look at Neptune.
Scientists think that there might be an ocean of super hot water under Neptune's cold clouds. It does not boil away because of the incredible pressure. That same pressure makes it impossible for a spacecraft -- or a person -- to drop deep into the clouds.
Neptune has six rings and 13 known moons. Neptune's largest moon, Triton, gets colder than Pluto. Voyager 2 spotted geysers of nitrogen gas on Triton.