1. Mission to Mars We have a goal : to go to Mars in 2025, we are going to talk about the vehicule.

2. I. The Spacecraft Our spacecraft will be a rocket composed of 3 essential elements

3. The Orbiter The orbiter is the most important element, it’s the only component that goes into orbit. It carries the freight and the crew.

4. The External Tank The second element is the external tank : it protects the orbiter until it reaches Space. Its role is essential because if the orbiter is damaged, the crew can die.

5. The Rocket Boosters The rocket boosters are as essential as the orbiter and the external tank. They are used to reach Space because the whole spacecraft is heavy then it needs a powerful boost to leave the Earth.

6. Dimensions length : 37,24 m Span : 23,79m Empty weight : 68 586,6 Kg Total weight when launched : 109 000 Kg Total weight when arrived : 104 000 Kg Presurized cabine : 71 m3 Average speed : 7 800 m/s Welcome up to 7 passengers (minimum 2) + Thermal shield composed of insulating tiles

7. II. Energy Comsumption I will talk about energy comsumption of the rocket going to Mars. A- The take-off

8. - The rocket has a motor of ergol liquid type.

9. - The rockets don’t use energy in Space, they only use energy to take off. - They use 100.000 liters of liquid oxygen and 60.000 liters of kerosene per minute for the take-off. - It takes five minutes to get out of the atmosphere. B- The return We intend to go to Mars, but what about the way back ?

10. To go back to the Earth there are a few hypotheses : - The MAAC : It is a system compressing carbon dioxide, we can use for the take-off. - The OGS : It is a system producing oxygen, we can use with the carbon dioxide. - The MATE : It is a system of solar panels producing electricity. - The DART : The dust is studied to avoid accumulation on solar panels. - The MTERC : A radiator is being tested to cool the reactor.

11. C- The production of electricity in the rocket - To produce electricity in the rocket, microbial cells are used. -These cells are based on the principle of combustible cells : the cathode is supplied with oxygen and the anode is set in a chamber containing the bacteria. -The system transforms all micro-organisms into electricity.