The idea that distant objects are receeding from us and thereby producing a proportional redshift --seems to be a fundamental tenant in terms of current cosmological thinking and theory. There have been alternate ideas proposed in the past including the tired light hypothesis-(whereby light traveling at great distances gives up energy to space and that this is what produces the red shift---still proportional to distance). If very distant objects are in fact receeding from us, they ought to be growing fainter in magnitude. Has this ever been measured ?? I wonder if the magnitude of distant objects on plates taken 20-30 years ago have ever been compared to present day magnitude of the same objects---to see-- if on average-- they have become slightly fainter. I wonder if our instruments are sensitive enough to make such a determination ???