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出典:『Wikipedia』 (2011/04/27 20:19 UTC 版)

英語による解説

引用

The Eridanus Group, sometimes called the Eridanus Cloud, is a nearby loose grouping of galaxies at a mean distance of approximately 75 Mly (23 ± 2 Mpc) in the constellation Eridanus. Redshift values show that there are approximately 200 galaxies associated with the group, approximately 70% of which are spiral and irregular type galaxies whilst the remaining 30% are elliptical and lenticular types.