NGC_251
NGC_251
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NGC_251Liên quan
NGC 251 NGC 2516 NGC 2506 NGC 2539 NGC 214 NGC 2715 NGC 2503 NGC 2419 NGC 2527 NGC 2613Tài liệu tham khảo
WikiPedia: NGC_251 http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsear... http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=... //doi.org/10.1086%2F498708 https://ui.adsabs.harvard.edu/abs/2006AJ....131.11...