good point: it’s deep space nine, not deep space ninety, so it’s likely not that far from earth.At the same time, Deep Space Nine is near Cardassian space and the station is called Deep Space Nine for a reason.
exactly. The old books chronology (which is not canon, but still) put the first contact around 2293, but there is no reason it couldn’t have happened earlier.Putting those two things together: I think the Federation could've known about the Cardassians as early as the 22nd Century (yes, I said it, and bear in mind I'm a non-fan of ENT), but wouldn't have had much reason to deal with them until their borders started butting heads with the Cardassians', leading to the Border Wars.