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Stellar evolution Standard candles Light sources Observational astronomy Nebulae IRAS 17163-3907 Protoplanetary nebula Extinction Cosmic distance ladder Astronomy Space Astrophysics | Astronomy & Astrophysics A&A 534, L10DOI:Add to Reading ListSource URL: www.aanda.orgDownload Document from Source WebsiteFile Size: 264,55 KBShare Document on Facebook |