Thực đơn
NGC_216 Tham khảoThực đơn
NGC_216 Tham khảoLiên quan
Tài liệu tham khảo
WikiPedia: NGC_216 http://cseligman.com/text/atlas/ngc2.htm#216 http://ned.ipac.caltech.edu/cgi-bin/objsearch?objn... http://spider.seds.org/ngc/revngcic.cgi?NGC216 http://server1.wikisky.org/starview?object=NGC+216 http://www.wikisky.org/?object=NGC+216 http://www.wikisky.org/?object=NGC+216&img_source=... http://www.wikisky.org/?object=NGC+216&img_source=... http://www.wikisky.org/?object=NGC+216&img_source=... http://www.wikisky.org/?object=NGC+216&img_source=... http://www.wikisky.org/?object=NGC+216&img_source=...