| Feature | TRAPPIST-1d | Earth |
|---|---|---|
| Size | Slightly smaller than Earth | About the same size as Earth |
| Pull of Gravity | Slightly weaker pull than Earth | Normal pull of gravity |
| Year Length | About 4 days | One year long |
| Distance from Star | Much closer to its star than Earth | Right distance from the Sun |
| Possible Life | Potentially habitable, but conditions are uncertain | We know life exists here! |