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Date: 2012-08-01 16:22:57Stellar classification Otto Struve William Wilson Morgan Edwin Brant Frost Star Yerkes Supergiant Henry Draper Catalogue White dwarf Star types Astronomy Space | national academy of sciences William Wilson MorganAdd to Reading ListSource URL: www.nasonline.orgDownload Document from Source WebsiteFile Size: 151,48 KBShare Document on Facebook |