Best science fiction film I've seen this year.
I'd describe it as very "hard" SF... I suppose the "science fiction" element in the movie is the depiction of how a Kessler effect and the impact (no pun intended
) on astronauts in orbit could look like: http://en.wikipedia.org/wiki/Kessler_syndrome
Technically, it's also a bit of a disaster film (...IN SPACE).