Awesome film

I have to agree with you on most points, and I still love the film but, unfortunately, it is not really the sort of film you describe - hiding it as a possible spoiler. The basic plot is given in the first 15 minutes of the film, and it involves another planet that exists - Previously Unknown - in Earth's orbit and always hidden by the Sun... This is a goofy concept to begin with. Anything as massive as Earth and in the same orbit - even if it was possible to maintain a permanent perfect opposition - would be known... Inferred through its gravitational effect on other planets.

Now, I understand that some people, loving this film, feel compelled to invoke... metaphysics... or fringe physics and claim that the planet can exist because, it is, somehow, in a separate universe. But that's not what the movie claims and the physical journey, to the far side of the Sun, is shown to be exactly that - a straightforward space journey. The precise nature of the planet is, of course, utterly absurd, and the movie functions not as science fiction (well, not as good science fiction) but as science fantasy. Essentially, what we have here is The Twilight Zone, only with a lot of technical detail.