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Mars Trip, the problem is, come back to Earth! The intuition of the Survivor-The Martian movie is correct: a manned mission could land on the red planet with relative ease, but go away would be more difficult. When NASA engineers look at Mars we see a big trap because a planet that draws us with the promise of new scientific discoveries.

But at the very moment in which we land there, the severity and the harsh climate conspire to keep us glued to the surface and do not make us return again. And this is not a hypothesis desirable. How difficult it is to get away from Mars tells us about The Survivor, The Martian, the new Ridley Scott sci-fi movie.

The story, set in the near future, is that epic solo Mark Watney (played by Matt Damon), an astronaut given up for dead by his teammates during a human mission to the red planet failed because of a sandstorm. The book from which this film, The Martian, was one of the publishing events of 2014.

Written by Andy Weir, is extremely detailed and scientifically accurate diary of the labors that Watney must do to succeed, editing machines left on Mars by the comrades, to produce oxygen and water, grow potatoes, survive on the planet and find a way to communicate with the Earth and return home.

Mars Trip, the problem is, come back to Earth!

In short, if we have learned anything from The Martian is that it should not spend billions of dollars to leave the astronauts stranded on another world. Not surprisingly, the most important part of any NASA plan to visit the red planet is just the return trip. And the spacecraft that NASA wants to build for this, the Mars Ascent Vehicle (MAV), is a formidable engineering challenge. A full fuel load would be too heavy for you can send directly from the Earth and let it get to Mars safely. The vehicle should then be pre-assembled and sent to the red planet a few years before the arrival of the Astronauts.

And there should independently derive their extracting fuel from the Atmosphere of Mars.

Mars Trip, the problem is, come back to Earth!

The MAV will have to be strong enough to remain fully operational on Mars despite massive dust storms and destructive UV radiation. When the small vehicle will take off at last, then, he will have to accommodate the astronauts for days, during the return to the orbiting ship maneuvers which finally bring them home. For the first human on Mars caravan, we will need five separate spacecraft, required to transport astronauts and their cargo on the planet. With the production of fuel on Mars, NASA could eliminate several tons from the list of the initial launch loads. And, after the first mission, the equipment useful could be left on Mars as basic building blocks of a more extended structure to create not only fuel but also water and air for future explorers. Among the many questions that engineers must take into account for the design of the MAV, one of the most important it is what the astronauts will wear.

Finally, it’s time to go. The interior of the MAV will Spartan to minimize the weight. There will be the inner space of a cab, not a flat.

Indeed, engineers may also decide not to put the seats, and astronauts should stand for the duration of the trip. The rocket ascent will last seven minutes. But the journey does not end here. Astronauts will have to burn more fuel to maneuver into an orbit that will allow them to dock at the vehicle that will take them back to Earth.

Mars Trip, the problem is, come back to Earth!

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Mars Trip, the problem is, come back to Earth!