Neptune

Kid's illustration of Neptune.
Neptune is the most distant planet from our sun.

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.

NEPTUNE CHALLENGE
Neptune is one of four 'gas giants'
in our solar system. What are the
names of the other gas planets?
Color image of Neptune.

WHAT'S IT LIKE ON NEPTUNE?
Windy. Neptune may be the windiest planet in the solar system. Winds tear through the clouds at more than 1,200 mph (2,000 kph). The winds blew Neptune's Great Dark Spot -- a storm as big as Earth -- across the planet at 700 mph (1,100 kph). That spot has since disappeared. A new one appeared on a different part of the planet.

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.


More: