Go to the scene where the Roger young docks at Ticonderoga after the first battle at BIG K. I believe Zander says something like "how could they have done this". Then they show a ship with a huge hole in its hull...so you can see the insides of it. If you look closely you can see people....or some object moving. If they were exposed to that in space they would have died...the same also happens when the Roger young is blown up...people fly out into space