# Floating Cities hard science - Can Cloud Nine be built? - Worldbuilding Stack Exchange https://worldbuilding.stackexchange.com/questions/36667/can-cloud-nine-be-built <!-- #list/scifi-concepts --> [Web URL for this note](http://notes.benjaminreinhardt.com/Floating+Cities) [Comment on this note](http://via.hypothes.is/http://notes.benjaminreinhardt.com/Floating+Cities)