1. The Planet Neptune
By: Caroline Lafferty

2. How did Neptune get it’s name?
It was named after the Greek god Neptune. During the Greek mythology times, astronomers named the 4 inner planets after the most important gods. Astronomers eventually found the outer planets and keep the tradition of naming them after the gods. Once they got to Neptune, they decided to name it after Neptune, the god of the sea. They named it this because of it’s bluish glow.

3. Neptune’s Symbol

4. Neptune’s discovery
Neptune was first discovered by Galileo in He recorded it though as a fixed star. It was found to be a planet in 1846 by Urbian Joseph le Verner by using mathematics.

5. Neptune’s distance Neptune is the 8th planet from the sun
It is 4,496.6 km away from the sun
It is also 4.4 billion km away from the earth!

6. Neptune’s Measurements
Neptune’s mass is e26 kg
Neptune’s volume is 102.4e24 kg
Neptune’s density is 1.64g

7. Would Neptune Sink or Float in Water?
Neptune would sink because it’s mass is heavier than 1.10g.

8. Neptune’s Atmosphere
Neptune’s atmosphere is made up of hydrogen, helium and methane. It has a very thin atmosphere since it has no firm surface.

9. Neptune’s Orbit and Rotation
It takes Neptune 165 years to orbit the sun
One day on Neptune is 16 hours and 6 minutes

10. Neptune’s Temperature
Neptune is very cold. It is considered as the “ice giant.” The average temperature for Neptune is -346º .

11. Neptune’s Composition
Neptune is considered a “gas giant” because of it’s atmosphere.
Neptune’s outermost layer is the cloud top. Then there are the gases (Hydrogen, helium and methane) and the last layer is rock and ice.

12. Neptune’s Weather
Neptune has very powerful winds up to 644mph and very strong storms. The blue spot on the planet is where the worst storm occurs.

13. Neptune’s Moons Neptune has 13 moons.
They are called Larissa, Naiad, Thalassa, Despina, Galata, Proteus, Titron, Nercid, S/2002/N2, S/2002/N3, S/2002/N4 and S/2002/N1.

14. Neptune’s Moons Discovery
Larissa-1989 Naiad Thalassa Despina Galata Proteus Titron Nercid S/2002/N S/2002/N S/2002/N S/2002/N

15. Where is Water found on Neptune?
The only water that is found on Neptune is in the atmosphere.

16. Could a Human Survive on Neptune?
The answer is no. Neptune is too cold and does not have gravity so the human would float into space.

17. Fun Facts about Neptune!
Neptune has the most violent storms than any other planet in our solar system If you weigh 100 pounds on earth, you would weigh 119 pounds on Neptune