I can't imagine how to rate this.
Jack Horkheimer: Star Hustler, on PBS
IMDb; official website (old); official website (new); PBS; Retro Junk; TV Tropes; Wikipedia
This started on a local Florida affiliate of PBS in 1976 (the year after I was born). It went national in 1985, and I couldn't possibly have seen it prior to that. In fact I'm not sure when I first saw it, but it could have been anytime between the mid 80s and the early 90s. Each episode was just five minutes long, and it would air late at night, as I recall. Like, I feel like it was possibly the last thing that aired before my PBS station went off the air, but I could be misremembering that. In any event, I never watched it on a regular basis, but I always enjoyed it when I did catch it. Not that I ever learned anything from it, but it was fun because... the host, Jack Horkheimer, was playing a sort of exaggerated version of himself, sort of overenthusiastic about informing viewers how to be amateur astronomers, or whatever. And he wasn't a particularly good actor, which is part of what made it fun to watch. (And it's understandable, since he wasn't an actor, he was actually the director of a planetarium. Also, I have a vague notion that when I was younger, he sort or reminded me of Scotty from Star Trek, though I'm not quite sure why that would have been.) Anyway, the show's title changed to Jack Horkheimer: Star Gazer in 1997, but by then I watched it rarely if ever. Since his death in 2010, it has had new hosts, and it's now called Star Gazers, but I've never seen any of that. (I probably hadn't seen it for several years before Horkheimer's death.) And I don't know what else to tell you, except that the thought of the show is now somewhat nostalgic for me.