NGC_121
NGC_121
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NGC_121Liên quan
NGC 121 NGC 1277 NGC 1261 NGC 1266 NGC 1817 NGC 1818 NGC 7217 NGC 171 NGC 128 NGC 12Tài liệu tham khảo
WikiPedia: NGC_121 http://cseligman.com/text/atlas/ngc1.htm http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsear... http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=...