SpazeTemperate rocky planet, 4 light years away, Proxima Centauri
Proxima Centauri b
The nearest exoplanet to us, in its star’s habitable zone. Whether it kept any air under the star’s flares is unknown.
- Distance
- 4.2 light years
- Year
- 11.2 days
- Size
- 1 × Earth
- Temperature
- -55 °C
- Mass
- 1.1 × Earth
- Found
- 2016, European Southern Observatory
Can we live on Proxima Centauri b?
Air: N₂, CO₂. Not breathable: you’d need a suit and your own oxygen.
Gravity: 1.01 g. Someone who weighs 70 kg on Earth would weigh 71 kg there.
Temperature: -55 °C on average.
Ground: Rock, possibly with water; atmosphere not yet measured.
Atmosphere
- N₂
- CO₂
- H₂O
Not measured yet: modelled from its size and temperature