1. Hector Lepage Thomas Constantin Tiphaine Willocq Melissa Pommier

2. Diameter : 6794 kilometres Weight : 6.42 billion tonnes Mars is the fourth planet and the seventh biggest one of the solar system.

3. Distance Earth-Mars : 0.37 astronomic unit (a.u) Gravity : 1/3 of the Earth gravity 2 satellites : -Phobos -Deimos

4. 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°.

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

6. Highest temperature : - 3°C Lowest temperature : - 133°C Average temperature : -63°C

7. 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

8. There is no greenhouse effect on Mars. The surface is radioactive because of the cosmic sun rays.