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NGC_1 Tham khảoThực đơn
NGC_1 Tham khảoLiên quan
Tài liệu tham khảo
WikiPedia: NGC_1 http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?n... http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsear... http://www.ngcic.org/public_HCNGC/The_HCNGC_intro.... http://seds.org/~spider/ngc/ngc.cgi?1 http://spider.seds.org/ngc/revngcic.cgi?NGC1 http://www.webcitation.org/5YYJF2PWV http://server1.wikisky.org/starview?object=NGC+1 http://www.wikisky.org/?object=NGC+1 http://www.wikisky.org/?object=NGC+1&img_source=DS... http://www.wikisky.org/?object=NGC+1&img_source=HA...