Regarding a number of posts, mainly a post by me on morphology and a post by Budgieye on distance I've begun a large, and inevitably very long project on the distances, and angular sizes of galaxies. You may have seen a few of my collections of galaxies at various redshifts -
I've only got a bit of data so far, so it's too early to make any conclusions, so I'm just making the raw data available here, and I'm eventually going to make a size collection group, too.
Do Galaxies Change in Size ? An Angular Size Test at Low Redshift with SDSS Data
Alexander Unzicker, Karl Fabian
(Submitted on 22 Nov 2010 (v1), last revised 7 Feb 2011 (this version, v3)) http://arxiv.org/abs/1011.4956