This is perhaps the worst space movie I've ever seen. Confusing, useless dialogue, over-long, slow, boring. The director tried to copy 2001 A Space Odyssey with no luck. Better watch this film or read a good book. The plot is easily understood by scientists like Carl Sagan or Stephen Hawkins but not for Joe Average, black holes, gravity effect etc. It shows interesting subjects but they could have been better written, making the movie much more attractive and interesting. What a waste of good acting and nice production design. One of the worst aspects of the movie is that actor McConaughey doesn't vocalize clearly and it is very difficult to understand his words. He must study with Henry Higgins (My Fair lady) so he can learn some phonetics!! But he is a very good actor, wasted on this film.