Messier_99
Messier_99
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Messier_99Liên quan
Messier 99 Messier 95 Messier 92 Messier 98 Messier 9 Messier 39 Messier 89 Messier 59 Messier 91 Messier 79Tài liệu tham khảo
WikiPedia: Messier_99 http://www.universetoday.com/am/publish/pparc_dark... http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?n... http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsear... http://simbad.u-strasbg.fr/Simbad http://xxx.lanl.gov/abs/1005.1455 http://www.seds.org/messier/m/m099.html http://server1.wikisky.org/starview?object=Messier... http://www.wikisky.org/?object=Messier+99 http://www.wikisky.org/?object=Messier+99&img_sour... http://www.wikisky.org/?object=Messier+99&img_sour...