Thực đơn
NGC_87 Tham khảoThực đơn
NGC_87 Tham khảoLiên quan
NGC 87 NGC 891 NGC 7331 NGC 3783 NGC 7027 NGC 89 NGC 752 NGC 7020 NGC 2775 NGC 973Tài liệu tham khảo
WikiPedia: NGC_87 http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsear... http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC... http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC... http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC... http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC... http://www.seds.org/~spider/ngc/ngc.cgi?87 http://server1.wikisky.org/starview?object=NGC+87 http://www.wikisky.org/?object=NGC+87 http://www.wikisky.org/?object=NGC+87&img_source=D... http://www.wikisky.org/?object=NGC+87&img_source=H...