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NGC_477 See alsoThực đơn
NGC_477 See alsoLiên quan
NGC 477 NGC 4274 NGC 4070 NGC 4278 NGC 4178 NGC 4473 NGC 4477 NGC 457 NGC 4372 NGC 7723Tài liệu tham khảo
WikiPedia: NGC_477 http://cseligman.com/text/atlas/ngc4a.htm#477 http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?... http://spider.seds.org/ngc/revngcic.cgi?NGC477 http://server1.wikisky.org/starview?object=NGC+477 http://www.wikisky.org/?object=NGC+477 http://www.wikisky.org/?object=NGC+477&img_source=... http://www.wikisky.org/?object=NGC+477&img_source=... http://www.wikisky.org/?object=NGC+477&img_source=... http://www.wikisky.org/?object=NGC+477&img_source=... http://www.wikisky.org/?object=NGC+477&img_source=...