By : Amanda Hoang and By : Amanda Hoang and Nicole TienNicole Tien

Neptune is made mostly of gasses, water and minerals. The first layer is made of liquid hydrogen. The second layer is water. Lastly, Neptune has a very rocky core made of nickel, iron and silicates.

Neptune has 13 moons but is very difficult to see with the naked eye from Earth. Neptune’s inner moons are Naiad, Thalassa, Despina and Galatea. Neptune’s outer moons are Larissa, Proteus, Triton and Nereid. Some others are Caliban and Sycorax.

Neptune's atmosphere is 80% Neptune's atmosphere is 80% hydrogen, 19% helium and 1% hydrogen, 19% helium and 1% methane. The methane gives methane. The methane gives Neptune its blue color. The upper Neptune its blue color. The upper atmosphere are clouds of ammonia atmosphere are clouds of ammonia and hydrogen sulfide. The lower and hydrogen sulfide. The lower atmosphere is made of hydrogen, atmosphere is made of hydrogen, helium and methane gasses.helium and methane gasses.

                          

                      

Scientists believe that under Neptune’s Scientists believe that under Neptune’s atmosphere there is either ice or liquid water. atmosphere there is either ice or liquid water. The climate is very cold and is approximately -The climate is very cold and is approximately -200° Celsius. Neptune’s weather has a lot of 200° Celsius. Neptune’s weather has a lot of storms with winds at nearly 600storms with winds at nearly 600 mph. mph.

After the discovery of Uranus, its orbit was not as it should be according to Newton’s laws. There for, another planet was predicted. Neptune was discovered by Galle and d’Arrest on September 23,1846. On 1613, Galileo saw Neptune when it was near Jupiter. Galileo thought Neptune was a star.

There has only been one visit to Neptune. The planet was visited by the Voyager2 on August 25,1989. Much of what we know about Neptune came from Voyager2 and HST. That means we don’t know a lot about the planet!

One year on Neptune takes 164.83 Earth years!

Neptune’s volume is 57 times more than Earth.

One day on Neptune is 0.75 Earth days.The average temperature is -370° F. Neptune is 2,794 million miles away from the

Sun.Neptune is the 8th planet and last in our solar

system.

The moon Triton reminds people of a cantaloupe.

Since people discovered that Neptune has 13 moons, they are the newest moons discovered since 1989.

Neptune's 4 inner moons are Naiad, Thalassa, Galatea and Despina.

Proteus is Neptune’s second largest moon.

Nereid was discovered in 1949.

Information for this power point was Information for this power point was from :from :

www.nasa.govwww.nasa.gov

www.kidsastronomy.com www.kidsastronomy.com

www.wikipedia.com www.wikipedia.com

www.google.comwww.google.com

www.nineplanets.orgwww.nineplanets.org

burro.astr.cwru.eduburro.astr.cwru.edu