What is Norma Cluster?
The '''Norma Cluster''' (ACO 3627 or Abell 3627) is a rich [[Wikt:cluster|cluster]] of [[galaxy|galaxies]] near the center of the [[Great Attractor]].<ref>[https://arxiv.org/abs/astro-ph/0006199 R. C. Kraan-Korteweg, in Lecture Notes in Physics 556, edited by D. Pageand J.G. Hirsch, p301 (Springer, Berlin, 2000).]</ref> It is both nearby and bright; but it is difficult to observe because it is in the [[Zone of Avoidance]]. This is a region near the [[Galactic plane|plane]] of the [[Milky Way]], which [[wikt:obscure|obscure]]s our view. The cluster is hidden by interstellar [[dust]] at optical wavelengths. Its mass is estimated to be on the order of 10<sup>15</sup> [[solar mass]]es.<ref>[http://adsabs.harvard.edu/cgi-bin/bib_query?1996ApJ...467..168B H. Boehringer ''et al.'', ''Astrophys. J.'' '''467''', 168 (1996).], [http://www.nature.com/nature/journal/v379/n6565/abs/379519a0.html R. C. Kraan-Korteweg ''et al.'', ''Nature'' '''379''', 519 (1996).]</ref> == Other websites == * [http://www.eso.org/outreach/press-rel/pr-1999/phot-46-99.html ESO Press Photos 46a-j/99] {{Webarchive|url=https://web.archive.org/web/20060922154211/http://www.eso.org/outreach/press-rel/pr-1999/phot-46-99.html |date=2006-09-22 }} * {{WikiSky|name=The Norma Cluster|z=9}} * [http://www.nasa.gov/multimedia/imagegallery/image_feature_1570.html Galaxy cluster has two 'tails' to tell]. [[NASA]] Image of the Day, January 22, 2010. ==References== {{Reflist}} {{sci-stub}} [[Category:Galaxy clusters]]