what happens is absolutely unscientific. for those who know a thing or two about space, this movie is torture from the start to the end. the characters are unfinished and they don't match the reality of the situation. the whole concept is flawed. on the brighter side, the visual effects are astonishing and mind-boggling. If they would have promoted this movie as a demonstration of most recent advances in visual effects, I would have given it a ten. but, a movie should be more than its looks. this movie doesn't have a soul. Sandra Bullock's portrayal of an astronaut is laughable at best. Clooney's character can be removed from the movie without having much of a consequence to the plot. if you want to watch a movie which is stupid and pointless yet somehow entertaining, this is for you. otherwise, don't bother.