There's never been an actual map or any visual anything (it seems) that shows a general map of the death star. I know it's gigantic but even still...so we know what some of the hallways look like, but I remember reading on Wookieepedia that there were shops and stores, and it made me think...is the death star so massive that it has the superlaser and military quarters but also a huge city complex inside?!?! Do they really need a moon-sized superweapon that holds billions of people?! What are all those people doing anyways?!