| PLANET | |
| Mars | |
| |
| Alternate name(s): | Sol IV |
| Classification: | Class M (Terraformed), previously Class K |
| Affiliation: | Terran Empire |
| Location: | Sol system |
| Moon(s): | Two: Phobos and Deimos |
| Dominant Species: | Terran |
| Population: | 133.8 million |
| Capital: | Ares City |
| Gravity: | 0.38 standard |
| Diameter: | 6,790 km |
| Length of day: | 24 hours, 37 minutes |
In the dark mirror universe, Mars was the fourth planet in the Sol system, and part of the Terran Empire.
Mars was the home facility for the Dystopia Planitia Fleet Yards in construction for a fleet of Imperial Starfleet vessels for centuries.