Hector LepageThomas Constantin

Tiphaine WillocqMelissa Pommier

Mars : observations

Diameter : 6794 kilometres Weight : 6.42 billion tonnesMars is the fourth planet and the seventh

biggest one of the solar system.

Mars characteristics

Distance Earth-Mars : 0.37 astronomic unit (a.u)

Gravity : 1/3 of the Earth gravity 2 satellites : -Phobos -Deimos

It makes a turn on itself in 24 hours and 37 minutes.

It makes the turn of the sun in 687 days.It is tilted at 24°.

There are many craters because a lot of stars fall on Mars .

Highest temperature : - 3°CLowest temperature : - 133°CAverage temperature : -63°C

Atmosphere of Mars

Gas : - 95.3 percent of carbon dioxide - 2.7 percent of nitrogen - 1.6 percent of argon - 0.15 percent of oxygen - 0.03 percent of water

There is no greenhouse effect on Mars.The surface is radioactive because of the

cosmic sun rays.