mfastx said:
It’s heavily implied that Yoda has come into contact with both of them before. In ESB he talks about how strong Luke’s father was, and in ROTJ he tells Luke to not underestimate the Emperor. He went into hiding on some random remote planet, it’s much less far fetched that they never went after him as opposed to Vader going after Luke who’s “hiding” with his family.
Where was it heavily implied? There’s no implication Yoda ever met any of these people in the OT. He watched Luke from the other side of the galaxy. He was in communication with Obi-Wan’s spirit. He was obviously aware that all of the other Jedi had been purged by Vader and the Emperor.
I mean, watching the movies, Dagobah could have been Yoda’s home planet for all you know. Obi-Wan could have gone there to train when he was younger and Vader didn’t know about it. Don’t tell me there’s some other explanation in a book somewhere. If it’s not in the movie, it’s not relevant.