The Martian

                The Martian is about a group of astronaut Martinez, Mark Watney, Beck, Johanssen and Vogel lead by Commander Lewis. They had been given a mission at Mars named Martian Mission. With current technology, the trips to Mars would take at least 150 days. Through this story, there are few ways to send a spacecraft there. The most energy-efficient routes is by put the spacecraft in a highly elliptical orbit that takes the spacecraft far beyond Mars once it deposits the astronauts on the planet surfaces. But, if something happens to the astronaut on the planet, there is no way they can return to Earth. Also, the astronaut’s depart spacecraft required thermal shielding. It is depends on what speed it depart the main craft and how much fuel needed. Radiation is a serious problem at Martian mission. Once astronauts leaves Earth’s magnetic field, they receiving large doses of radiation from solar flares and cosmic rays. Some can be stopped by plastic but the other needed lot of shielding. So, they build a protective cabin by using metal or water to absorb the radiation. I am curious about the weather of Mars. Mars has storm but the atmosphere is too thin and the pressure is too low to blow piece of satellite and hurt Mark. About gravity at Mars, Mark performs little hops when walk across the surfaces because the gravity less than Earth. Low gravity also helps Mark to move heavy equipment and his ketchup flow more quickly in movie than in real life. Lastly, Mark seems sweating a lot in his spacesuits. He also gets cold easily because heat dissipates quickly on the Mars surfaces.