Circumference

Mars has an equatorial circumference of **21,297 **kilometers, which is about half a long as Earth's.

**Volume**

Mars has a volume of **163,115,609,799** cubic kilometers. That makes second smallest planet, behind Mercury.

Mass

If we put Mars on a balance, it would have a mass of **641,693,000,000,000,000,000,000 **kilograms.

Density

Mars has a density of **3.9** grams / cubic centimeter. That makes it the least dense of the terrestrial planets.

Gravity

Mars has a gravitational pull of **3.7** meters / seconds squared. If we ever send astronauts to Mars, they will weight a lot less there.

Rotation Period

It takes Mars **24.6** hours to complete a rotation, which is nearly the same as Earth.

Revolution Period

Mars revolves around the Sun every** 1.88** earth years.

Tilt

Mars has a tilt of **25.2** degrees. This means it has seasons very similar to Earth.

Temperature

Mars has an average surface temperature of **-63** degrees Celsius. This means it's probably just a little too cold for life.