NGC_2261
NGC_2261
Thực đơn
NGC_2261Liên quan
NGC 2261 NGC 2264 NGC 2281 NGC 226 NGC 2266 NGC 2613 NGC 1261 NGC 2217 NGC 2241 NGC 2291Tài liệu tham khảo
WikiPedia: NGC_2261 http://www.nightskyinfo.com/archive/hubble_nebula/ http://cmhas.wikispaces.com/c46 http://www.psi.edu/about/staff/esquerdo/deepsky/NG... http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=... http://365daysofastronomy.org/2009/01/26/january-2... //doi.org/10.1086%2F156627 http://server1.wikisky.org/starview?object=NGC+226... http://www.wikisky.org/?object=NGC+2261 http://www.wikisky.org/?object=NGC+2261&img_source... http://www.wikisky.org/?object=NGC+2261&img_source...