system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Had Luke ever been off of Tatooine before the events of ANH?

While he definitely is a small town kid whose world is very small he also seems a bit cavalier about going to Alderaan, hiring a pilot, and calling the Falcon a "piece of junk" when he may never have been that close to a ship before. Had Owen saved up his credits to take the family to Disney Planet or South of the Quasar one year, sparking a calling in Luke to leave the Outer Rim someday, or did he know enough about the workings of the Galaxy from books and/or the HoloNet?
gpt
I mean, he was technically born many light years away from Tatooine, and was transported there as an infant. 

But in the spirit of your question, no he never left the planet. Owen (and of course Obi Wan) went to great pains to shield Luke from the wider world and his monster of a father. In Owen's mind, it was perfectly acceptable to try and keep Luke "realistic" by having his time filled with tedious farm work and always finding excuses to keep Luke tied to the farm even as his friends left for the Imperial Academy. Anything Luke would have "really" learned about the galaxy at large would have come from gossip he heard from his friends, as well as any traders or pilots he overheard when he managed to leave his adoptive parent's home. So he would have known a thing or two even without leaving his homeworld. Though the knowledge would have been skewed by his youthful arrogance and exuberance.