I learned about the Sachs-Wolfe Effect when I was discussing the CMB, since it is a major artifact of it. I do have one very basic question: Is the CMB the only place we observe the effect, or do we see it every day in other places? I suppose the way to look for it would be to try to place a massive, closer gravitational body (some galaxy) in between a distance source of starlight in question. This might be accomplished by measurements half a year apart, similar to triangulation for near stars, so that the nearer galaxy moves across the background with respect to the more distant starlight. I know research like this must have been done, but I don't have access (sadly) to a scientific journal yet, so I can only find references to the CMB when I do internet searches for the SWE. Thanks, I very much appreciate your help!