Facts About Neptune, the Farthest Planet in 3D
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Neptune at a glance
If Earth were the size of a nickel, Neptune would be about as big as a baseball.
- Order from the Sun
- 8th of 8
- Type
- Ice giant
- Distance from the Sun
- 4,515 million km (30.18 AU)
- Diameter
- 49,528 km (3.88× Earth)
- Length of day
- 16.1 hours
- Length of year
- about 165 Earth years
- Moons
- 16
- Rings
- Yes
- Average temperature
- -200 °C (-328 °F)
- Gravity
- 112% of Earth's
- Axis tilt
- 28.3°
- Sunlight takes
- about 4 hours
On Neptune you would weigh about 90 (112% of your Earth weight). Your mass stays the same; only gravity changes.
Source: NASA Planetary Fact Sheet and NASA Science. Giant planets have no solid surface; gravity is given at the cloud tops.
Neptune facts quiz
8 questions about Neptune