In the book, itвЂ™s explained how this plucks methane out of the Martian atmosphere to create fuel. To leave the Red Planet, each Ares crew uses a Mars Ascent Vehicle (MAV). WeвЂ™ll call this one a tie.ДЄn actual Martian habitat might need to be submerged to keep its occupants safe from radiation. вЂњThe structures will be on the surface, but machines will be used to protect them with Martian sand.вЂќДЄnd what about Watney, who spends more than a year on the surface, often with nothing more than his spacesuit for protection? Well, although the radiation levels on Mars are less than expected, itвЂ™s possible he would have considerably increased his risk of cancer, although he was unlikely to have experienced any immediate effects during his stay. вЂњThe reality isВ I think people will go underground, to protect against radiation from the Sun,вЂќ said Schmidt. ItвЂ™s likely that the habitat as depicted in the film might be a bit different on a real future Mars mission it might be necessary to partly submerge it in the ground, providing natural protection from radiation. Modern astronauts stay in the safe confines of EarthвЂ™s magnetosphere, while the Apollo astronauts spent just a few days at the Moon.Д«ut on Mars, each Ares crew was spending up to a month on the surface in the movie. Spending any prolonged amount of time in space, weвЂ™re talking months or years, runs an increased risk of developing a radiation-related sickness, such as cancer. вЂњWe actually have experiments going on right now using simulated Mars soil, and it indicates thatвЂ™s a very realistic idea.вЂќ вЂњIn terms of basic mineral content and chemical content, yes it would be possible to grow plants in Martian soil,вЂќ said Lavery. But would Martian soil actually be of any use? IsnвЂ™t it sterile and dead? In the movie, after becoming stranded on the surface, Watney resorts to using a combination of his own excrement, water, and Martian soil to grow potatoes. вЂњThis is not just a story, the author has done real computations,вЂќ Rudi Schmidt, ESA Project Manager for Mars Express and also a consultant on the film,В told IFLScience.ДЇuture manned Mars missions will use a constantly orbiting spacecraft akin to Hermes (shown). While some science fiction films have the characters whizzing from point to point, 'The Martian' reveals the brutal reality of spaceflight: It would take about eight months to get to or from Mars with current technology. Perhaps one of the best factual aspects of the film is the accuracy ofВ the travel time between Earth and Mars. But hey, weвЂ™re not letting him get off scot-free. To be fair, Andy Weir readily admitsВ the dust storm was used simply to move the plot along and leave Mark Watney stranded on Mars. ItвЂ™s not going to have the sort of energy to move large objects the way that is portrayed in the book and the film.вЂќ вЂњBut aВ 100 mph wind on Mars, because the atmosphere is so thin, has the same inertia and dynamic pressure down at the surface as about an 11 mph (18 km/h) wind on Earth. вЂњDust storms certainly do occur on Mars, they get winds in excess of 100 mph (160 km/h),вЂќ Dave Lavery, Program Executive for Solar System Exploration at NASA headquarters and a consultant for the film, told IFLScience. But hey, at least it's out of the way nice and early. This is probably the least scientific part of the movie.

Although Mars does get dust storms, the atmospheric pressure is so low that the wind is negligible, although the dust itself can be harmful. LetвЂ™s get the big one out of the way nice and early: The dust storm that sets everything in motion at theВ start of the movie is not accurate. So if you havenвЂ™t read the book or seen the movie yet, continue at your own peril. But just how did they do? Here we pick through the science in the movie, with the help of a few experts, to see if 'The Martian' is deserving of its accolades.Д«e warned, though, there are some spoilers in this post. WeвЂ™ve seen the movie, and weвЂ™ve got to say, itвЂ™s amazing how far weвЂ™ve come since 'Armageddon' (shudder).В NASA has been so impressed, they've beenВ using the movie as a marketing campaignВ for their own, actual manned missions to Mars in the 2030s.Д«ased on the book of the same name by Andy Weir, itself praised for its accuracy, director Ridley Scott asked NASA to check the film and ensure everything in it was correct вЂ“ or as correct as can be. 'The Martian' is hitting cinemas right about now, and already it is being heralded as one of the most scientifically accurate sci-fi films of all time.

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