"No air?" That's utterly baffling. So it really is like a sea? But not wet... Donnie hums as he considers things. It's true that it gets a little harder to breathe the higher up you go...

"But isn't air needed to ignite a fire? How can you use a cannon up there?"

It's hard picturing how anything works in the sea of stars. "If things only keep moving until something else interacts with it, what's making them move to begin with?"

Suits and tunnels are at least easier to understand. "They use special suits and airtight passages for the submersibles," he says.