1. Planet Neptune
By: Diamond-Charlay

2. History
Who named Neptune: Neptune was god that did not have a planet in his name.
What does Neptune mean: God of the sea

3. Discovery
Some sources that the astronomers Galle and d'Arrest discovered Neptune on September 23, 1846
Other people say that Adams in 1846.

4. Planet Structure
Solid rock core, gas and ice mantle inside

5. Atmosphere
80% hydrogen,19% helium,0.5 methane and traces of other compounds
diameter: 49,532 km (equatorial) mass: e26 kg

6. Missions How long are its years and days?
A year on Neptune lasts for 165 Earth years.
A day on Neptune is shorter than a day on Earth.
This gas planet spins, or rotates, once every 16 hours.

7. Motion orbit: 4,504,000,000 km (30.06 AU) from Sun.
Neptune is the eight planet from the sun.
Neptune orbits slowly because it is farther away from the sun.
Size, color Neptune seems to be a twin to Uranus.
Neptune does not spin on its side; its axis tilts only a little more than that of Earth.

8. Data Diameter: 49,528 km Average distance from the sun:4.5 billion km
Mass:10,240x10^22 kg
Surface gravity (Earth=1):1.12
Average temperature:-225c
Length of sidereal day:16.11
Length of year:164 Earth days
Number of observation moons:8*

9. other
The rings of Neptune are made up of fairly small, very dark clumps of rock.
Scientists think that most of these clumps are about the size of a small car.
There is also a large amount of dust in the rings. one of the rings has a twist in it.
Uranus orbit didn't seem to obey the laws of physics.
Something was making Uranus move unexpected.

10. sources http://www.wordsources.info/neptune.html