Mars
Mars has the tallest volcano (Olympus Mons) and the largest canyon (Valles Marineris) in the solar system. It is the primary target of current missions searching for past life.
astronomy.planets.terrestrial
Metrics
Diameter
Mean diameter.
Mass
Orbital Period
Sidereal orbital period.
Distance from Sun
Mean distance (1.524 AU).
Relations
Similar day length, but significantly smaller and colder.
Explanations
Mars, with a diameter of 6,779 km, is significantly smaller than Earth and takes 687 days to orbit the Sun – nearly twice as long as Earth does. What makes it remarkable is that it hosts the highest volcano and the largest canyon in our entire solar system. With an average temperature of 210 K (about −63 °C) and two known moons, Mars is currently the primary target for missions searching for evidence of ancient life.
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Provenance
Status
seed
Review
none
Last Updated
2026-02-17