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![]() Date: 2011-09-01 13:00:09Astronomy Stellar evolution Astrophysics Nature Nebulae Star types Astrochemistry Observational astronomy Planetary nebula Protoplanetary nebula Nebula Asymptotic giant branch | Source URL: www.astro.keele.ac.ukDownload Document from Source WebsiteFile Size: 279,81 KBShare Document on Facebook |