SpazeSub-Neptune, 97 light years away, GJ 9827
GJ 9827 d
A steam world: JWST found its atmosphere is mostly water vapour.
- Distance
- 96.7 light years
- Year
- 6.2 days
- Size
- 2 × Earth
- Temperature
- 402 °C
- Mass
- 3 × Earth
- Found
- 2017, K2
Can we live on GJ 9827 d?
Air: H₂O. Not breathable: you’d need a suit and your own oxygen.
Gravity: 0.77 g. Someone who weighs 70 kg on Earth would weigh 54 kg there.
Temperature: 402 °C on average.
Ground: A steam world: an atmosphere mostly of water vapour.
Atmosphere
- H₂O
Measured by Hubble, JWST