Sometimes, under direct sunlight, clouds will appear gray or dark gray against a blue sky or larger backdrop of white clouds. There are usually two reasons for this effect. This latter reason is ...
On Rum, Europe’s newest dark-sky sanctuary, the island’s 40 residents ... with the support of Steven Gray and James Green, two astronomers who started Cosmos Planetarium, a mobile theater ...
France’s Landes de Gascogne Regional Natural Park (PNR) has been officially designated as an International Dark Sky Reserve, recognizing the collective efforts of the region in preserving and ...
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