-221°C to + 5,000°C
29,891 miles (48,105 km)
Distance from the Sun:
2.8 billion miles (4.5b km)
Rotation about axis:
Revolution about Sun:
Neptune is named after the Roman god of the sea because of its blue colour.
It is the stormiest planet in the Solar System with winds that can blow up to 1,240 miles per hour, three times as fast as Earth's hurricanes.
Neptune also has distinctive bright blue methane clouds, much like cirrus clouds on Earth.
However, these clouds whip around the planet at speeds exceeding 700 mph.
Space & The Sea
• Small fish bowl
To create this gas giant planet a special dye called fluorescein was used.
Fluorescein is a red powder which glows bright yellow when added to water and exposed to ultraviolet light.
When NASA spacecraft land in the sea they release large amounts of the non-toxic fluorescein into the water which helps recovery teams to locate them.