Cosmic Scale
Neptune vs Mars: size comparison
Neptune is about 7.26 times wider than Mars: 49,240 km across against 6,779 km.
Compare them in 3D, at true scale
| Neptune | Mars | |
|---|---|---|
| Diameter | 49,240 km | 6,779 km |
| Mass | 1.02 × 10²⁶ kg | 6.42 × 10²³ kg |
| Light crosses it in | 0.16 seconds | 0.02 seconds |
- Neptune has about 383 times the volume of Mars.
- Neptune is about 160 times more massive than Mars.
- Light takes 0.16 seconds to cross Neptune, and 0.02 seconds to cross Mars.
Neptune: Its winds are the fastest in the Solar System, over 2,000 km/h.
Mars: Home to Olympus Mons, a volcano nearly three times the height of Everest.