Dark Skies UKさんのイラストまとめ
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The Commission for Dark Skies (CfDS) is the UK's biggest anti-light-pollution campaign group. facebook.com/CampaignforDar…
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It's International Dark Sky Week Apr 22-30!
More info about events to observe and celebrate our dark skies at https://t.co/u8q4nEomwv
Making your skies darker: https://t.co/cRE8WIM5sw
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