[Oh man, that look. That's the kind of look he loves to see when he talks about space.]

There's so much space beyond them, and it's all beautiful. We're exploring it here, seeing just what's out there in this other world. And you won't be alone doing it! You'll have plenty of other friends to help you out!

[He's... really not sure how to explain the Reality TV thing. If she didn't know what space was nor know that he wasn't flat because of the communicator screen, then surely they didn't have any sort of television there.