Well before it is relocated in Emissary, it's referred to as 'Deep Space Nine', when in orbit of Bajor -- hardly deep space! And even after its -unplanned- relocation to the wormhole, the station still doesn't seem to be very far away from Bajor (can be reached in 3 hours at impulse).
So, does the label 'Deep Space' just mean that it is not located in a 'core' region surrounded by other Federation territory, but rather one of its outposts, close to the Cardassian border ?
So, does the label 'Deep Space' just mean that it is not located in a 'core' region surrounded by other Federation territory, but rather one of its outposts, close to the Cardassian border ?