What real scientists and astronauts think of 'The Martian' movie

The film adaptation of Andy Weir's sci-fi novel "The Martian" opens everywhere on Friday, October 2, and it has amassed a huge fan following - partly thanks to the book's scientific accuracy and realism.

But does the story's dedication hold up under scrutiny from real scientists and astronauts?

We've rounded up some of the best critiques of "The Martian" from space experts who've seen the movie. The reception so far has been positive, but some of the movie's most discerning critics couldn't help but point out a few glaring errors.

Keep scrolling to see what they had to say.

Warning: Spoilers ahead if you haven't read the book "The Martian."