Book checks his pockets, startled. He doesn't usually carry anything on him, so he didn't realize that he had anything new, but, sure enough, there is a small communicator in his pocket. "Interesting."

"Well, the basic difference is that a ship can travel through space, it has engines, designed to go places. A space station is supposed to stay in one place, usually orbiting a planet, but it doesn't go anywhere. They're usually used as refueling stations or trading posts, in my home." Book is pressing buttons while he is explaining to Yuna. This is more advanced than anything from Book's world, but it doesn't take him too long to find the map.

He blinks a few times, and frowns. "Fifteen people, taking care of a Station this big?"