NGC 1987
NGC 1987
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NGC 1987Liên quan
NGC NGC 4993 NGC 4302 NGC 2392 NGC 404 NGC 6822 NGC 4565 NGC 3393 NGC 5238 NGC 4889Tài liệu tham khảo
WikiPedia: NGC 1987 http://cseligman.com/text/atlas/ngc19a.htm#1987 http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=... http://spider.seds.org/ngc/ngc.cgi?1987 http://spider.seds.org/ngc/revngcic.cgi?ngc1987 https://books.google.com.au/books?id=F4lsaf2TTh4C&...