Widdekind Posted November 16, 2012 Posted November 16, 2012 i learned about the "Dn-sigma" & "Holmberg" relations from Galaxy Formation & Evolution by Mo, van den Bosch, and White (p.271,718):
Arnaud Antoine ANDRIEU Posted November 16, 2012 Posted November 16, 2012 (edited) Hi, This started me thinking about that : http://en.wikipedia.org/wiki/File:Shield-Trinity-Scutum-Fidei-English.svg Edited November 16, 2012 by Arnaud Antoine ANDRIEU
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