Yeah - we've only got the one world we're all on, we haven't figured out space yet. The most we've managed is sending people to the moon at one point, but no one lives there or anything.

[...You know, once in a while it kind of occurs to him that Rey is technically an alien and that is actually pretty cool if you ask him.]

That's insane, though, that people would build something like that in the first place - it doesn't surprise me that they would, but it's kind of a lot to process, you know? Something that could just take out an entire planet in one go.