Good question. [ well, questions, but he focuses on the last one for now. ]

There are definitely other planets out there, and this colony isn't the only place here in Tellus. I don't know what else is out there beyond the colony, though, as we're pretty much trapped here.

[ a pause, before he continues again. ]

The colony's in some kind of invisible dome, making sure that people don't fly too high - if they can - or something. Even worse - to make sure that nobody leaves.