Was testing the 19.10.13prospector_nosound_linux build and found a bug:
If you fly out of the airlock on a space station when in possession of a spacesuit, you will switch to your spacesuit and be able to explore at least one tile of space around the outside of the station. The problem is that you don't take your helmet off when re-entering the station, so you will die from asphyxia if you don't revisit your ship to refill your oxygen.
Interestingly, I also noticed that your oxygen is refilled when you visit a bar, but not when you visit any other shops/offices.