Looking for a Sci-Fi novel I found in a library and read around 1963. It involves the creation of a single, physically scaled down galaxy inside some kind of force field. Observers are somehow able to couple with individuals on various worlds to learn about the subject's civilization. Supposedly the link is one way with no control of, or communication with the being selected. Time is accelerated so only one pass at any observing any given subject is possible. As the galaxy ages some of the civilizations develop a "religion" centering around escaping the galaxy before it collapses. Does anyone recognize the story?