Thực đơn
Messier 71 Tham khảoThực đơn
Messier 71 Tham khảoLiên quan
Messier 87 Messier 77 Messier 4 Messier 5 Messier 66 Messier 102 Messier 110 Messier 15 Messier 100 Messier 74Tài liệu tham khảo
WikiPedia: Messier 71 http://www.deepskyvideos.com/videos/messier/M71.ht... http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=... http://www.perseus.gr/Astro-DSO-NGC-6838.htm http://gclusters.altervista.org/cluster_4.php?ggc=... //arxiv.org/abs/0707.1602 //arxiv.org/abs/1004.2255 //arxiv.org/abs/1008.2755 //arxiv.org/abs/1108.4402 //doi.org/10.1086%2F521780 //doi.org/10.1088%2F0004-6256%2F140%2F6%2F1830