Mercury
The smallest planet and closest to the Sun. Its surface is heavily cratered and experiences the most extreme temperature swings in the Solar System.
| Mass | 3.3010e+23 kg |
|---|---|
| Radius | 2,439.7 km |
| Surface gravity | 3.7 m/s² |
| Escape velocity | 4.25 km/s |
| Day length (rotation) | 4,222.6 hours |
| Year length (orbit) | 88 Earth days |
| Distance from Sun | 0.387 AU |
| Mean temperature | 167 °C |
| Moons | 0 |
Source: NASA Planetary Fact Sheet. Values are means/approximations for education.
Try it: your weight on Mercury
On Mars (gravity 3.71 m/s²) you would weigh 259.7 N — a scale would read about 26.482 kg. Your mass (70 kg) never changes.