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Date: 2012-09-12 15:26:55Astrometry Star types Parallax Astrological aspects Binary stars 61 Cygni Friedrich Bessel Star Hipparcos Astrology Astronomy Space | Resolved Astrometric Binary Stars Brian D. Mason[removed]Add to Reading ListSource URL: www.ast.cam.ac.ukDownload Document from Source WebsiteFile Size: 490,60 KBShare Document on Facebook |