Many parts are based on true elements. The way the astronaut in 'The Martian' has to ration his resources is a reflection of real - life space mission planning. The use of solar power, which is a crucial energy source in space exploration, is also accurately portrayed. The movie also takes into account the real - life risks of space travel, such as radiation exposure. All these elements are based on real - world knowledge and experiences in the field of space exploration, making the story feel more believable even though it is a fictional account of an individual's survival on Mars.