Entering orbit…
| Yours | TRAPPIST-1 h | |
|---|---|---|
| Mass | 0.20 × Earth | 0.33 × Earth |
| Radius | 0.65 × Earth | 0.76 × Earth |
| Density (composition) | 3.98 g/cm³ | 4.17 g/cm³ |
| Temperature | 218.7 K | 172.0 K |
| Starlight received | 0.38 × Earth | 0.14 × Earth |
| Star temperature | 6,750 K | 2,566 K |
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.