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![]() Date: 2013-07-01 17:55:13Astronomy Stellar evolution Star types Outer space Nature Nebulae Standard candles Observational astronomy Planetary nebula Red supergiant Protoplanetary nebula Asymptotic giant branch | Source URL: www.astro.keele.ac.ukDownload Document from Source WebsiteFile Size: 204,08 KBShare Document on Facebook |