Below are a few of my favorite images via BustBright's "Science and Tech Ads" flickr set. I have removed the text and cropped the ads in order to show only the artwork. Why did I do this? Well, I think the art looks more like "art" when it is isolated from the ad; the work seen in these ads would not look out of place on a gallery wall. Commercial artists don't get the praise they deserve and in my opinion there is no difference between a "commercial artist" and a "fine artist". I have put the ad's tag phrase in quotes to act as a title.
If you are interested in more of this "space race" imagery, you should check out Megan Prelinger's book Another Science Fiction. Here is a link to an article about the book.