When the movie got released it was reviewed by at least one scientist and that man only found a few flaws.
I really can't believe it's the least scientific movie you've ever seen...unless you've only seen 3 movies in your life.
Perhaps there have been less scientifically accurate movies out there, but what bothered me most about Gravity's egregious inaccuracies is that they were crucial to the advancement of the plot. Although I am the kind of person who would still nitpick over small inaccuracies (like the fact that Sandra's tears wouldn't float away from her face), I don't let those kind prevent me from enjoying a movie. However, when you rely on the errors to tell your story that is when I get really bothered.
Here are the major problems, and they were all critical to the plot:
MAJOR SPOILER ALERT:
1 - The Hubble Space Telescope and the International Space Station are not in the same orbit. It would have been impossible to travel from one to the other.
2 - The ISS and the Chinese Space Station are not in the same orbit. It would have been impossible to travel from one to the other.
3 - None of these are in the same orbit as the communications satellite, so the orbital debris could not have taken them out. It was a critical plot element that there be no communication with the ground.
4 - George died for no apparent reason. Sandra had stopped his motion relative to the space station. All she would have needed to do was a simple tug toward herself and he would have been saved. There is no force that would have made him float away once he was brought to rest.
There are other inaccuracies that demonstrate that the makers of the film did not understand orbital mechanics -- and the whole plot is based on orbital mechanics -- but those don't bother me as much as the above. When terrible science gets in the way of the story-telling, that's when I'm very bothered as a movie-goer.
Furthermore, in addition to the horrible science, I found the characters to be unsympathetic. I was not drawn in by their stories and developed no real concern for what would happen to them. In fact, I'm not sure the movie would have been any worse had the actors not been in it at all. It just wasn't very good story-telling.
I will, on the other hand, grant that the special effects were very good, and some of the interior weightless scenes were very well done.
I have spent a lot of time in Florida and they do often have very localized rains only a few hundred yards across and, yes, you can see them coming (if in an open area) and get out out of the way. I don't recall a dramatic temperature drop at the edge of them however. Although you can feel a several degree drop in air temperature just before those large thunderstorms with a roll cloud on the leading edge. These, you can't get out of the way of, only seek shelter.
