Mars is the fourth planet from the Sun, or Sol, the star in Earth's Solar System. Things or people from Mars are referred to as "Martian". By the late 22nd-century, Mars had been extensively colonised, and possibly terraformed, by the Space Corps.
Mars was the origin of Martian power packs, which unlike Ouroboros batteries, were notoriously unreliable. One such power pack was used in Kryten's Psi-Scan, and he notably struggled with it whilst trying to scan Dr. Hildegard Lanstrom's base. Kryten still used it since he had an affinity for cheap, budget or economy models. ("Quarantine", Series V)
- Mars at Wikipedia