Earth vs Proxima Cen b
Earth and Proxima Cen b are close in size and Earth runs the hotter. Earth is the closer of the two to Earth, with an Earth-similarity index of 1.00.
| Earth | Proxima Cen b | |
|---|---|---|
| Type | Rocky world | Rocky world |
| Size (radius) | 1.00 R⊕ | 1.02 R⊕ |
| Surface gravity | 1.00× Earth | ≥ 1.01× Earth |
| Equilibrium temperature | 15°C (59°F) | -55°C (-67°F) |
| Year (orbital period) | 365 days | 11 days |
| Distance from Earth | in our solar system | 4.2 ly |
| Earth-similarity index | 1.00 | 0.89 |
Common questions
Is Earth bigger than Proxima Cen b?
Proxima Cen b is the larger of the two: Earth is 1.00 R⊕ across and Proxima Cen b is 1.02 R⊕, where Earth is 1 R⊕.
Which has stronger gravity, Earth or Proxima Cen b?
Proxima Cen b pulls harder: surface gravity is 1.00× Earth on Earth and ≥ 1.01× Earth on Proxima Cen b.