I’m looking for an episode of a childrens’ cartoon featuring a young (teenage?) astronaut. As far as I recollect, he was flying a red-white striped rocket (not unlike Tintin’s rocket, but my memory might conflate things a bit.) I seem to remember that his name was Archie or similar, and that he built his rocket himself.
The specific episode, that I have in mind, is a rather philosophical one for a childrens’ show. He lands on a flat disc and on examining it he learns, that on that disc people live in a 2D world. That is, they have no height at all and are 2D in a strict sense. The protagonist explains these features in a (for a young viewer) rather consistent and fascinating way.
I’ve seen the cartoon in the mid 90s. But I’m rather sure, that it was a re-run and produced much earlier, perhaps late 70s? The drawing style was somewhat naturalistic and the colors were a bit toned down.