Neptune is a very stormy planet with wind speeds of more than 2000 km/h (1200 mph).
The ice giant Neptune was the first planet located through mathematical predictions rather than through regular observations of the sky.
Nearly 4.5 billion kilometers (2.8 billion miles) from the Sun, Neptune orbits the Sun once every 165 years.
Neptune's atmosphere extends to great depths, gradually merging into water and other melted ices over a heavier, approximately Earth-size solid core. Its blue color is the result of methane in the atmosphere.
Learn more about Neptune and other Planets at National Aeronautics and Space Administration.