Mars

by the numbers

6,794

Diameter in kilometres – around half that of Earth

687

Number of Earth days in a

Martian year

0.375

The strength of gravity when compared to the

Earth standard

2

Number of Martian moons

-62.80

6

Average temperature on Mars

Number of Mars-sized planets it would take to fill

Earth's volume

45

Missions launched to Mars

since 1960

19

Number of successful missions

in that time

25

The height of the tallest Martian mountain, Olympus

Mons, in kilometres