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Date: 2011-08-17 20:03:42Astrobiology Exoplanetology Space colonization Libra constellation Habitable zone Planetary habitability Gliese 581 c HD 85512 b Extrasolar planet Astronomy Planetary science Space | Add to Reading ListSource URL: arxiv.orgDownload Document from Source WebsiteFile Size: 372,16 KBShare Document on Facebook |