Cosmic Scale
Mars vs Mercury: size comparison
Mars is about 1.39 times wider than Mercury: 6,779 km across against 4,879 km.
Compare them in 3D, at true scale
| Mars | Mercury | |
|---|---|---|
| Diameter | 6,779 km | 4,879 km |
| Mass | 6.42 × 10²³ kg | 3.30 × 10²³ kg |
| Light crosses it in | 0.02 seconds | 0.02 seconds |
- Mars has about 2.7 times the volume of Mercury.
- Mars is about 1.9 times more massive than Mercury.
- Light takes 0.02 seconds to cross Mars, and 0.02 seconds to cross Mercury.
Mars: Home to Olympus Mons, a volcano nearly three times the height of Everest.
Mercury: A year on Mercury is shorter than one of its days.