Compare Worlds
Put any objects side by side, with sizes drawn to true relative scale.
Earth
Mars
Disc areas drawn to true relative diameter. Objects with no defined radius (spacecraft, nebulae) are omitted from the picture.
| Property | Earth | Mars |
|---|---|---|
| Type | Planet | Planet |
| Radius | 6,371 km | 3,390 km |
| Surface gravity | 9.81 m/s² | 3.71 m/s² |
| Day (rotation) | 23.9 h | 24.6 h |
| Year (orbit) | 365.2 days | 687.0 days |
| Distance | You are here — 149.6 million km from the Sun | From 55 million to 400 million km from Earth; about 225… |
| In one line | The only place in the universe where life is confirmed to exist. We call it home. | Once wet, now cold, the rusty desert world next door is the main target for human… |
“—” means the property doesn’t apply or isn’t defined for that object. Full sourced figures live on each object’s own page.