Whitefall
From The Firefly and Serenity Database
The fourth moon of Athens, Whitefall, a large percentage of which is owned by a woman named Patience. Whitefall is said to not be civilization "in the strictest sense". The crew visits Whitefall hoping to sell their cargo to Patience in the episode "Serenity". It is rumored that there is a Blue Sun facility underneath one of the mountains.
