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Date: 2015-02-22 06:59:14Variable stars Standard candles Lyra constellation Constellations Astrometry Semiregular variable star RR Lyrae variable Cosmic distance ladder Globular cluster Astronomy Space Astrology | Astronomy & Astrophysics A&A 556, A20[removed]DOI: [removed][removed]Add to Reading ListSource URL: www.danidl.co.ukDownload Document from Source WebsiteFile Size: 1,84 MBShare Document on Facebook |