I also think it's a clip of a much longer sequence, at 00:36 they appear to be just above the clouds, Janek (Idris Elba) says something (not really sure what it is), then we see the ship going low into a valley in a shot we all know about. Who cares about the editing at this point, we're probably only talking about a minute or so at the most. It definately feels like Alien, you can also here David in the background making observations just like Ash did on approach, plus there's a few nice nods in the form of identical dialogue here and there....cool....I liked it.