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Neptune's Statistics
Fun Fact: Neptune was discovered by Johann Galle in the 1800's.
| Feature |
Information |
| Diameter |
49,532 km. |
| Distance from Sun |
4.498 billion km. |
| Speed around Sun |
5.48 km/s |
| Sunrise to Sunset |
16.11 h. |
| Mass when Earth= 1 |
17.2 |
| Volume when Earth= 1 |
57.74 |
| Density when Water= 1 |
1.64 |
| Cloud-top temperature |
-200 degrees Celsius |
| Number of Moons |
8 |
Atmosphere Composition
| Gas Name |
Percent |
| Hydrogen |
80.00% |
| Helium |
19.00% |
| Methane and other gases |
1% |
Inner Neptune
| Level (atmosphere-core) |
Name |
Materials |
| 1 |
Atmosphere |
hydrogen, helium |
| 2 |
Mantle |
icy water, methane, ammonia |
| 3 |
care |
Silicate rock |
Spots
| Name |
Features |
| Great Dark Spot |
-size of Earth
-rotates every 16 days |
| Scooter |
-changes shape everyday
-southern hemisphere |
Moons
| Name(closest to planet to farthest) |
| Naiad |
| Thalassa |
| Despina |
| Galatea |
| Larissa |
| Proteus |
| Triton |
| Nereid |
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