1. By Mary LaRochelle, Leilani McCauley, and Sarah Bermel
Neptune
By Mary LaRochelle, Leilani McCauley, and Sarah Bermel

2. Neptune is named after the Roman God of the Sea.
History
Neptune is named after the Roman God of the Sea.
Neptune was the first planet found by mathematical prediction.
Unexpected changes in the orbit of Uranus led astronomers to
deduce that its orbit was subject to a gravitational
pull by the planet Neptune.
Galileo first observed Neptune on December 28, 1612,
and again on January 27, 1613.

3. What it would be like to visit Neptune?
Life on Neptune would be impossible
There is no oxygen found
Neptune has extreme storms.
The Great Dark Spot is a Giant Anti-Cyclonic Store
Neptune is covered by clouds and is very windy.
Winds can range 20 m/s to 325 m/s
It has the strongest sustained winds of any planet
Neptune is very cold.
It is -200 degrees Celcius
The interior of Neptune is consists of ice and rock

4. Layers

5. Neptune is the 8th planet from the Sun.
Distance from the Sun
Neptune is the 8th planet from the Sun.
From the earth, Neptune is approximately 4.4 billion kilometers away
Neptune is 4,496 kilometers, or 2,794 million miles, away from the sun

6. Interesting Facts
The South pole is 10 degrees warmer than the rest of the planet.
Neptune has rings that are made of dust particles
The blue color of Neptune is from Methane gas
Neptune is 17 times the mass of the Earth
Neptune can never be seen by the Naked Eye
Voyager’s closest visit was in August 25, 1989

7. Composition Composition: More than half of Neptune is
Hydrogen 80%, there
is 19%of helium, and
1.5%of methane there is a very
Small amount of Hydrogen
Deuderide (HD) and Ethane (C2H6)

8. Moons Neptune has 13 moons.
The moons are: Triton, Thalassa, Naiad, Despina, Galatea, Larissa, Proteus, Nereid, Halimede, Sao, Laomedeia, Psamathe, and Neso
Triton is the largest Moon
Triton

9. Size and Density Size: This is the forth largest planet. It’s diameter
equator is about miles
and a little smaller than Uranus ,but 4x as
big as Earth. Its mass is 1.2x
greater than Uranus.
Density:
Its density
is g/cm
denser than Uranus.
It is the 3rd largest
planet in mass.

10. Revolution :It takes 164.8 days this happen is minerals that make
to rotate the sun .Its period of revolution in earth years is What makes
this happen is minerals that make
up its density.

11. Rotation Rotation: The period of rotation
is 17.7 hours its days of rotation is
days.