oooh... introduced in Rise, apparently to explain why they needed to have fancy devices to pinpoint how to get to things. I thought it was just because they legit didn't know where these places were, rather than that they had no direct path.
@FormerGameDev Introduced probably with novelizations in the 80's, so still long after TOS, but it never really appears outside of novels until Rise. This stuff that blocks hyperspace travel at the edge of the galaxy is found through out the galaxy as well, which is why they have to have well charted hyperspace routes. I think Rise is the first movie where they mention hyper space lanes as well, which sounds contrived the first time you hear it, but finding new routes is actually very risky.
yeah this doesn't really sound like a .. barrier.. per se, but just a zone of space that is not safe to travel at light speed through. Whereas in Trek, it actively prevents people from entering/exiting the galaxy.
Correct. The "barrier" in Star Wars is a mess of hyperspace disturbances that prevent safe navigation. Ancient Jedi and Sith found ways through using the Force, and using the relics they stored these routes in ("wayfinders") is the only way to traverse it.