I was reading this (perhaps offbeat) "anti-big-bang" article,
and the author comments "a recent catalog of objects having very large redshifts shows that among 109 quasi-stellar objects for which both absorption and emission lines could be measured, the value of the absorption redshift of a given object is always different from the one measured in emission for the same object."
I had trouble Googling this. What is a particularly good "example object" of this phenomenon (if any), perhaps where I can see the issues arising discussed?
Is there a prosaic or generally accepted "conventional" explanation?
BTW I've just realised the article is perhaps from 1988 (it's somewhat confusingly also dated 2012) - so this may be completely out of date.