04 · terrestrial

Mars

A cold desert world, red with rusted iron. Home to the tallest volcano and the deepest canyon in the system.

Distance from Sol

228 m km

Surface gravity

3.72 m/s²

Day length

24.6 hrs

Mean temperature

−63 °C

Orbital period

687 days

Atmosphere

95% CO₂ at 0.6% of Earth's sea-level pressure. Thin enough that the sky is butterscotch at noon and blue at sunset. Dust storms can envelope the globe for weeks.

Notes

Olympus Mons rises 21.9 km above the mean surface — two and a half Everests. Valles Marineris cuts 4,000 km across the equator. Polar caps of water ice and dry ice advance and retreat with the year.

Illustrative scale · orbital distances compressed. Not an ephemeris.