NGC 501
NGC 501
Thực đơn
NGC 501Liên quan
NGC NGC 5195 NGC 4302 NGC 4993 NGC 404 NGC 4889 NGC 6822 NGC 2392 NGC 6397 NGC 4298Tài liệu tham khảo
WikiPedia: NGC 501 http://cseligman.com/text/atlas/ngc5.htm#501 http://www.klima-luft.de/steinicke/ngcic/persons/m... http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?... http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC... http://spider.seds.org/ngc/revngcic.cgi?NGC501 http://server1.wikisky.org/starview?object=NGC+501 http://www.wikisky.org/?object=NGC+501 http://www.wikisky.org/?object=NGC+501&img_source=... http://www.wikisky.org/?object=NGC+501&img_source=... http://www.wikisky.org/?object=NGC+501&img_source=...