Gravity was an OK movie it just that I happen to know a little bit about Celestial/orbital mechanics so some of it content had me grinding my teeth together.
Kind of like seeing a movie base on say the railroads when you happen to have a background in railroading at least enough so you know when the movie people are bullshitting you.
Yes Gravity is pure Hollywood nonsense, it's already been torn apart by scientists. The director admits he had to cut corners to keep the plot going.
To get back to earth, Clooney and Bullock had to hop from one space station to another, all conveniently orbiting at exactly the same height, speed and trajectory, I never swallowed that, but the film was still fun to watch..