Space, says the introduction to the guide, is big. Really big. You just won't believe how vastly, hugely, mind bogglingly big it is.

http://www.nature.com/nature/journal/v513/n7516/full/nature13674.html
Laniakea: Our home supercluster
http://www.engadget.com/2014/09/05/milky-way-galaxy-laniakea-supercluster/

But is it self similar at all scales?