As Martin Sheen said in the fine documentary "Space," this movie deals seriously with almost every aspect of a flight to the moon. It makes some dreadful errors that, even in 1929, could and should have been avoided (an atmosphere on the moon, for example). But, it nevertheless treats the subject and the viewer with respect. When I saw this movie at a New York revival house, a live pianist provided the silent film's accompaniment. I encourage you to see it this way, as that somehow made it even easier to put myself in the place of an early 20'th century filmgoer, and see this fine movie for what it was. The story is light, but the beckoning mystery of outer space is captured in a way that will make you feel you know something more than you used to about the people who made, and first saw, these images. And, when you do, remember that real space flight was 30 _years_ away. (Later, you might ponder that the first lunar landing is now _more_ than 30 years ago, but do that after you enjoy this sweet look at, as Fred Pohl put it in another, related, context, "the way the future was.")
One extra bit of advice: Keep your ears open at the moment of launch. All of the effects in this movie are, naturally, simple and gray-haired. Nevertheless, when the rocket actually took off, my audience gave an audible reaction because, I think, Lang decided to emphasize an aspect of what a rocket is, and what it can do, that virtually all later film-makers have decided to ignore. They should see this movie, and learn a little something.