Entering orbit…
| Yours | TRAPPIST-1 d | |
|---|---|---|
| Mass | 0.60 × Earth | 0.39 × Earth |
| Radius | 0.87 × Earth | 0.79 × Earth |
| Density (composition) | 4.99 g/cm³ | 4.37 g/cm³ |
| Temperature | 1,400 K | 286.0 K |
| Starlight received | 0.69 × Earth | 1.11 × Earth |
| Star temperature | — | 2,566 K |
Inside the synchronous orbit: tidal decay dragged it down - it struck the planet ages ago.