Interstellar is a great movie -- imo, easily the best SF movie ever made. It might just be one of the greatest films of all time.
So why a forum post? I figure there are lots of debatable issues in the movie, certainly lots of questions to be asked. I think I've answered most of them, to my own satisfaction anyway -- but I can think of at least one offhand that I have not.
Before I get into any details, though, I should point out that I intend this to be a forum for people who HAVE SEEN this movie. So expect spoilers galore here. If you haven't seen this film yet, and if you don't want to know anything in advance -- you should get out of here right now.
Truth is, though -- I believe it doesn't make much difference what you know in advance of seeing this movie. Imo, it's not the SURPRISE of the film that makes it great -- though it certainly has plenty of surprising elements. For me, it was the depth of its ideas, the intensity of its emotions, and the intelligence of its execution that make this movie great. But that's just me. You might feel very differently -- so be warned:
SPOILERS AHEAD.
Here's one question I can't answer: How was Cooper found, in the end? Floating in space? Huh? It seems he was found somewhere near Saturn -- but the movie skips over exactly how that happened. After all, he was out there in space with just a spacesuit between him and oblivion, right? How did he survive long enough to be found? And where? Just floating around in space??
Or did "They" -- the supremely intelligent and powerful beings that humanity becomes in the deep, deepest future imagined by this movie -- somehow manipulate Cooper's reality so that he ended up somewhere near an Earth outpost near Saturn, where he was found by Earth's first interplanetary explorers? Maybe. It would have been some years after his daughter Murph unveiled to the world the solutions to the equations -- transmitted to her by her father through the seeming magic of gravity-space-time -- that finally allowed humanity to slip the bonds of Earth and live anew in the stars. Could he (Coop) have survived that long in empty space with nothing to aid him but a spacesuit? Again, maybe... because "They" are able to bend time (and space) to their will, and perhaps he did not have to survive out there very long at all.
But I'm not sure about this answer. If anyone else has any thoughts here, I'd love to hear them. Or if anyone has any other thoughts or questions at all about this most extraordinary movie -- let's talk about it.