SpazeCold sub-Neptune, 124 light years away, K2-18
K2-18 b
A sub-Neptune where JWST found methane and carbon dioxide. Whether it hides an ocean is hotly debated.
- Distance
- 124 light years
- Year
- 32.9 days
- Size
- 2.4 × Earth
- Temperature
- 11 °C
- Mass
- 8.9 × Earth
- Found
- 2015, K2
Can we live on K2-18 b?
Air: H₂, CH₄. Not breathable: you’d need a suit and your own oxygen.
Gravity: 1.59 g. Someone who weighs 70 kg on Earth would weigh 111 kg there.
Temperature: 11 °C on average.
Clouds: Possibly a water ocean under a hydrogen sky (still debated).
Atmosphere
- H₂
- CH₄
- CO₂
Measured by JWST