Thực đơn
NGC_7020Thực đơn
NGC_7020Liên quan
NGC 7020 NGC 7027 NGC 7006 NGC 7209 NGC 7001 NGC 7023 NGC 7009Tài liệu tham khảo
WikiPedia: NGC_7020 http://cseligman.com/text/atlas/ngc70.htm http://nedwww.ipac.caltech.edu/ http://adsabs.harvard.edu/abs/1990NASCP3098..189B http://kudzu.astr.ua.edu/devatlas/NGC_7020______B_... //doi.org/10.1086%2F168819 //doi.org/10.1088%2F0004-6256%2F139%2F6%2F2465%2Fp... http://iopscience.iop.org/article/10.1088/0004-625... http://server1.wikisky.org/starview?object=NGC+702... http://www.wikisky.org/?object=NGC+7020 http://www.wikisky.org/?object=NGC+7020&img_source...