Entering orbit…
| Yours | GJ 229 b | |
|---|---|---|
| Mass | 7.90 × Earth | 14.9 × Earth |
| Radius | 3.01 × Earth | 3.97 × Earth |
| Density (composition) | 1.60 g/cm³ | 1.31 g/cm³ |
| Temperature | 204.1 K | 112.0 K |
| Starlight received | 0.02 × Earth | 0.02 × Earth |
| Star temperature | 6,750 K | 3,564 K |
Inside the synchronous orbit: it spiraled inward and was torn apart at the Roche limit (Phobos's fate).
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.
A thin tidal-warmed subsurface ocean may exist, but conditions are marginal (41/100).
Merged with an adjacent moon: too close for both to hold a stable orbit.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.