Cosmic Scale
Earth vs Mercury: size comparison
Earth is about 2.61 times wider than Mercury: 12,740 km across against 4,879 km.
Compare them in 3D, at true scale
| Earth | Mercury | |
|---|---|---|
| Diameter | 12,740 km | 4,879 km |
| Mass | 5.97 × 10²⁴ kg | 3.30 × 10²³ kg |
| Light crosses it in | 0.04 seconds | 0.02 seconds |
- Earth has about 17.8 times the volume of Mercury.
- Earth is about 18.1 times more massive than Mercury.
- Light takes 0.04 seconds to cross Earth, and 0.02 seconds to cross Mercury.
Earth: The only known world with life — and liquid oceans on its surface.
Mercury: A year on Mercury is shorter than one of its days.