[ Well, Della has...a document! That's the first thing. ]

I found it on the boat hanging from the cartography room. There was a...puzzle to get at it, but the rope isn't connected to it anymore, so getting back up there won't be easy. I noticed the maps in there, they're not just of one planet. There's my Earth, what I assume is some of yours, even Aela's Skyrim... And a planet called Pandora. That one was how I got up to the boat.