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Astrophysics Open clusters Space Classical Cepheid variable Star cluster NGC 457 Cosmic distance ladder Color–color diagram Globular cluster Astronomy Astrometry Standard candles | Astronomy & Astrophysics A&A 537, L4[removed]DOI: [removed][removed]Add to Reading ListSource URL: www.aanda.orgDownload Document from Source WebsiteFile Size: 1,15 MBShare Document on Facebook |