The Mirrorball Man wrote:
The flying through space in that scooter exposed to the vaccume, without the TARDIS to project and air corridor or or gravity bubble - or no mention that the "scooter" was capable of projecting one - really bugged me.
Doctor Who is not Star Trek. The series is not big on technobabble. If the Doctor is flying through space on a scooter, and that doesn't kill him, there's no need to mention that somehow the scooter is protecting him: it's obvious.
It isn't technobabble to provide explanations to reasonable questions. Amy asked "What are we breathing?" when dangling from the TARDIS in "The Beast Below", and the Doctor gave a reasonable, non technobabble explanation.
In this case, we were shown an entire system that seemed to have a breathable atmosphere where it should have been open space. As bryce
noted, like Niven's The Integral Trees
. Not only that, but the apparently earthlike environment on those asteroids included normal gravity. Anyone with a third-grade grounding in science should have been wondering what was going on there. Why didn't Clara? One of the reasons for a companion in the show is to ask the questions the audience must be asking.