NGC_231
NGC_231
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NGC_231Liên quan
NGC 231 NGC 2392 NGC 2360 NGC 2359 NGC 2362 NGC 23 NGC 2419 NGC 2715 NGC 2346 NGC 6231Tài liệu tham khảo
WikiPedia: NGC_231 http://cseligman.com/text/atlas/ngc2.htm#231 http://ned.ipac.caltech.edu/cgi-bin/objsearch?objn... http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=...