>>2845
Of course, pure black space is kinda boring, but so is flat blue. Usually you do something like pic 1 related if you want to make it look good. If you take very long exposure photography, you get something like this (google "milky way"), although you can't normally see it with your eyes.
As for the city, photos are the best reference. When you expand very far, usually you hit an ocean, a forest, or empty plains of some kind.