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Neptune




Symbol
Diameter49532 km, 3.89 x Earth's
Mass17.2 ME
Volume54 VE
Average Distance from Sun4497 x 106km = 30.058 AU
ColourBlue
Temperature-180°C
AtmosphereHydrogen, helium and methane
Length of Day16.1 hours
Length of Year165 years
No. of Moons8
Gravity1.194 x Earth's



Neptune is the eighth planet in the Solar System, and the last of the gas giants. It was discovered in 1846. Neptune's Great Dark Spot

Neptune looks blue, like Uranus, and also has a dark spot, which is a huge storm, like the Great Red Spot on Jupiter.

Neptune was actually the furthest planet from the Sun between 1979 and February 1999 because Plutoís orbit is so oval that it sometimes passes inside Neptune's. Clouds in Neptune's atmosphere

Neptune has rings like Saturn's that are made of dust and small pieces of rock. They are much harder to see than Saturnís because they are made of a much darker material that doesnít reflect the Sunís light as well.

Neptune has the fastest winds in the Solar System, reaching speeds of 2000 kph.





Planets Introduction

Mercury

Venus

Earth

The Moon

Mars

Jupiter

Saturn

Uranus

Pluto

Asteroids

Comets

Meteorites

Extra-Solar Planets



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Authors: Carolyn Brinkworth and Claire Thomas

Last updated: July 2001