SpazeCold sub-Neptune, 21 light years away, GJ 581
GJ 581 c
A cold sub-neptune 21 light years away that circles its star every 12.9 days. Found in 2007.
- Distance
- 20.5 light years
- Year
- 12.9 days
- Size
- 2.5 × Earth
- Temperature
- 73 °C
- Mass
- 6.8 × Earth
- Found
- 2007, La Silla Observatory
Can we live on GJ 581 c?
Air: H₂, He. Not breathable: you’d need a suit and your own oxygen.
Gravity: 1.09 g. Someone who weighs 70 kg on Earth would weigh 76 kg there.
Temperature: 73 °C on average.
Clouds: Cold hydrogen and methane envelope.
Atmosphere
- H₂
- He
- CH₄
- NH₃
Not measured yet: modelled from its size and temperature