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Date: 2015-02-22 07:06:18Universe Lyra constellation Variable stars Astrometry RR Lyrae variable RR Lyrae Cosmic distance ladder Globular cluster Hertzsprung–Russell diagram Astronomy Space Standard candles | Astronomy & Astrophysics A&A 548, A92[removed]DOI: [removed][removed]Add to Reading ListSource URL: www.danidl.co.ukDownload Document from Source WebsiteFile Size: 2,48 MBShare Document on Facebook |