Thực đơn
Messier 9 Tham khảoThực đơn
Messier 9 Tham khảoLiên quan
Messier 87 Messier 5 Messier 77 Messier 102 Messier 15 Messier 110 Messier 4 Messier 100 Messier 74 Messier 95Tài liệu tham khảo
WikiPedia: Messier 9 http://www.tgdaily.com/space-features/62135-the-gl... http://adsabs.harvard.edu/abs/1927BHarO.849...11S http://adsabs.harvard.edu/abs/2002MNRAS.332..441F http://adsabs.harvard.edu/abs/2008MNRAS.385.1998K http://adsabs.harvard.edu/abs/2011ApJ...742...51B http://adsabs.harvard.edu/abs/2013MNRAS.434.1220A http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=... http://gclusters.altervista.org/cluster_4.php?ggc=... //arxiv.org/abs/0801.0871 //arxiv.org/abs/1108.4402