Differences between Earth and Mars

Earth

Surface area: 510,1 million km²
Diameter: 12 742 km
Average distance from the Sun: 149,6 million km
Gravity: 9,81 m/s²
Length of a day: 24 h
Length of a year: 365 days
Natural satellites: 1 (the Moon)
Temperature: min -93,2 °C, max 56,7 °C, average 15 °C

Inhabitants: 8 178 705 441

Atmospheric composition: 78.087% nitrogen, 20.95% oxygen, 0.93% argon, 0.041% carbon dioxide, along with traces of other gases.

Water: Earth is the only known planet with large amounts of liquid water on its surface.
Seasons: Earth has 4 seasons thanks to the tilt of its axis (23.4°).
Special feature: it is the only known planet to harbor life.
Remarkable landform: Mount Everest, Earth’s highest point at 8,849 m above sea level.

Natural satellite

Moon

Mars

Surface area: 144 million km²
Diameter: 6 779 km
Average distance from the Sun: 227,9 million km
Gravity: 3,71 m/s²
Length of a day: 24 h 39 min 35 s
Length of a year: 687 Earth days
Natural satellites: 2 (Phobos and Deimos)
Temperature: min -143 °C, max 20 °C, average -63 °C
Population: 0 inhabitants

Atmospheric composition: 96% carbon dioxide, 1.9% argon, 1.9% nitrogen, with small amounts of oxygen, carbon monoxide, water vapor, and methane.

Water: Mars has water ice at its poles and beneath its surface. Evidence shows that liquid water once existed there.
Seasons: Mars also has seasons thanks to the tilt of its axis (25.2°), which is fairly close to Earth’s.
Special feature: Mars is often called the “Red Planet” because of the iron oxide in its soil.
Remarkable landform: Olympus Mons, the largest volcano in the solar system, rises to about 22 km high.
Another impressive feature: Valles Marineris, a huge canyon stretching more than 4,000 km.

Natural satellites

Phobos

Deimos