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Date: 2012-12-19 12:38:22Astronomy Light International Dark-Sky Association Dark-sky movement Dark-sky preserve Street light Night sky Planetarium Sky Light pollution Observational astronomy Lighting | IDA eNews: Night Watch 1 October 2012Add to Reading ListSource URL: www.darksky.orgDownload Document from Source WebsiteFile Size: 692,80 KBShare Document on Facebook |