"The sky?" she asks with curiosity.  "Yeah, and there's space beyond that.  Just vast emptiness where the sun, the moon and the stars float around."  At the offer of the food, she gestured her dismissal.  "I just ate beforehand.  I should return the favor, though: would you like me to explain about Earth, then?  I can show you television and the Internet, and that should be able to explain the rest easily enough."