Europa vs Io
Io is about 1.2 times as wide as Europa and they sit at a similar temperature.
| Europa | Io | |
|---|---|---|
| Type | Rocky world | Rocky world |
| Size (radius) | 0.24 R⊕ | 0.29 R⊕ |
| Surface gravity | 0.13× Earth | 0.18× Earth |
| Equilibrium temperature | -171°C (-276°F) | -163°C (-262°F) |
| Year (orbital period) | 11.9 years | 11.9 years |
| Distance from Earth | in our solar system | in our solar system |
| Earth-similarity index | 0.30 | 0.35 |
Common questions
Is Europa bigger than Io?
Io is the larger of the two: Europa is 0.24 R⊕ across and Io is 0.29 R⊕, where Earth is 1 R⊕.
Which has stronger gravity, Europa or Io?
Io pulls harder: surface gravity is 0.13× Earth on Europa and 0.18× Earth on Io.