The Jupiter 2 set is located on Stage 3 at 'The Bridge' Studios.
The show's healthy budget allowed the production team to create the fully functional Jupiter 2 set [no it can't fly]
As far as it is known there are two levels to the 'Jupiter 2' Colony Ship.
Fri March 3, 2017[]
Bill Mumy and Max Jenkins "Willpower" on the upper deck of the Jupiter 2 set, stage 3 at 'The Bridge' studios in Vancouver
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Bill Mumy and Max Jenkins on the Lower deck of the Jupiter 2 set
[Note: the two images seem to be taken on different days - Maybe Thu 2 & Fri 3]