I've said this before and I'll have to say it again: I wish I could turn off my brain and just enjoy a movie without picking it apart.
There are two types of science fiction movies, those that call themselves science fiction, but are really fantasies, and those that make a serious attempt to stay within the realm of plausible science or extrapolations of current scientific fields. "The Martian" was so close. But no. Alas, It is a rescue fantasy movie just like Orbit was. It is an excellent movie full of action, drama, and suspense. But it was so loaded with major issues being overlooked that I had to switch modes almost right away from a mentality, something that could really happen transcribed and augmented to a fictional situation, to total fantasy....something that could never happen. ...from "Apollo 13" to "Robinson Caruso on Mars" ...not that Robinson Caruso on Mars was a cinematic gem, but it is just as plausible as "The Martian" is.
I want to make it clear, I liked this movie. I liked it a lot. I am just really angry that so many little things.... little things that would not have been hard to correct were ignored for unnecessary dramatic effect. I was so angry that on three separate occasions the movie resorted to cliches that have been used in every single space rescue movie and TV show from "Marooned" to 20 episodes of Star Trek, Babylon 5, and Stargate. ...plot complications any one subjected to an Irwin Allen TV show would recognize... I'm getting tired of outlining the course of a movie before it unfolds because the same plot devices and complications are being rehashed.
Those that want to know nothing of the movie should stop reading now, but there's no spoilers here if you know the plot or have seen the previews.
---
---
When a mission to mars is forced to leave quickly due to a massive wind storm that threatens to knock over the ascent vehicle Mark Watney (Matt Damon) is separated from his group and thought dead by the rest of his crew. He is left for dead on the planet. He has to figure out how to survive on the planet until he can figure out a way to be rescued.
Problem #1 and a big, gigantic issue: the initial cause of Matt Damon's character being marooned was, without doubt, completely wrong and totally impossible. ...not improbable, impossible as shown. A 100 mile an hour wind on mars carries about the same force as a 10 mile an hour wind on Earth. There are 100 mile and hour winds on mars, but they can only blow up dust... not rocks and debris. The atmosphere of Mars is equal to the atmosphere on Earth at about 100,000 feet! This is known stuff to anyone who cares to look at wikipedia, JPL, or any page on the internet about the planet.
Problem #2 Mars has no magnetic field to speak of. This means that solar radiation (Gama, Cosmic Rays). Walking around in a space suit and probably even in the hab as well, this astronaut is receiving the equivalent of one full body CT scan every four or five days in radiation.
Problem #3 would be a spoiler. It happens toward the end.
The rest of the issues become more academic and pedestrian, but this is why the movie goes from the realm of believable scifi to escapists fantasy.
As escapists fantasies go (Vertical Limit, Cliffhanger, Orbit).... I really liked it.