Earth vs Neptune
Neptune is about 3.9 times as wide as Earth and Earth runs the hotter. Earth is the closer of the two to Earth, with an Earth-similarity index of 1.00.
| Earth | Neptune | |
|---|---|---|
| Type | Rocky world | Ice / gas giant |
| Size (radius) | 1.00 R⊕ | 3.88 R⊕ |
| Surface gravity | 1.00× Earth | 1.14× Earth |
| Equilibrium temperature | 15°C (59°F) | -201°C (-330°F) |
| Year (orbital period) | 365 days | 165 years |
| Distance from Earth | in our solar system | in our solar system |
| Earth-similarity index | 1.00 | 0.21 |
Common questions
Is Earth bigger than Neptune?
Neptune is the larger of the two: Earth is 1.00 R⊕ across and Neptune is 3.88 R⊕, where Earth is 1 R⊕.
Which has stronger gravity, Earth or Neptune?
Neptune pulls harder: surface gravity is 1.00× Earth on Earth and 1.14× Earth on Neptune.