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Date: 2014-07-18 14:17:55Sawyer Hogg Hogg David Dunlap Observatory Variable star Star Frank Scott Hogg Astronomy Main Belt asteroids Helen Sawyer Hogg | Helen Sawyer Hogg Astronomer Leading Astronomer Helen Sawyer Hogg held a doctorate in astronomy from Radcliffe College in Massachusetts. She conducted significant research onAdd to Reading ListSource URL: www.swc-cfc.gc.caDownload Document from Source WebsiteFile Size: 374,11 KBShare Document on Facebook |