Earth vs Mercury
Earth is about 2.6 times as wide as Mercury and Mercury runs the hotter. Earth is the closer of the two to Earth, with an Earth-similarity index of 1.00.
| Earth | Mercury | |
|---|---|---|
| Type | Rocky world | Rocky world |
| Size (radius) | 1.00 R⊕ | 0.38 R⊕ |
| Surface gravity | 1.00× Earth | 0.38× Earth |
| Equilibrium temperature | 15°C (59°F) | 167°C (332°F) |
| Year (orbital period) | 365 days | 88 days |
| Distance from Earth | in our solar system | in our solar system |
| Earth-similarity index | 1.00 | 0.54 |
Common questions
Is Earth bigger than Mercury?
Earth is the larger of the two: Earth is 1.00 R⊕ across and Mercury is 0.38 R⊕, where Earth is 1 R⊕.
Which has stronger gravity, Earth or Mercury?
Earth pulls harder: surface gravity is 1.00× Earth on Earth and 0.38× Earth on Mercury.