Details : Item 214
| Mom | Son | Bird | Cat | Daughter | Dad | Dog | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Terrestrial planets |  |  |  |  |  |  |  | ||||
| Gas giants |  |  |  |  |  |  |  | ||||
| Gas giants 2 |  |  |  |  |  |  |  | ||||
| Ice giants |  |  |  |  |  |  |  | ||||
| Dwarf planets |  |  |  |  |  |  |  | ||||
| Others |  |  |  |  |  |  |  | ||||
 | |||||||||||
| Famille : Terrestrial planets /Daughter |
|---|
|
| Mercury |
| Terrestrial planet The smallest planet in the Solar System An observer on Mercury would see only one day every two years. |
| Properties | |
|---|---|
| Albedo | 0.142 |
| Radius (km) | 2,439.7 |
| Mass (kg) | 330.11x10+23 |
| Density (g/cm3) | 5.427 |
| Gravity (m/s2) | 3.7 |
| Orbital period (days) | 87.969 |
| Orbital speed (km/s) | 47.362 |
| Temperature (K) | 200->340 |
| Discovery date | 1300 BC (Assyria) |