These three thumbnails are my more refined choices. The first thumbnails is a rubbish compartment, this seems ideal because the Space Pug could be searching through it to find his chew toy that gets sucked out into space, this would set up the scene nicely.
The observation pod enables a small. self-sufficient space station model and also fits with the presumed search for Dark Matter with the TV screens.
The last thumbnail is a little more obscure, a food compartment could be where the pug is searching for his toy which is mistaken for refuse and ejected into space.