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Let there be dark: the battle to save our sky from light pollution

15.12.2019
Příroda
The spread of electrical lighting is blocking out the stars and threatens the health of many species ... including humans. Now our national parks plan to take back the nightNOAA-20 probably has the best view of the North York Moors, even though it's 512 miles away. In one sweep - on a clear night - the weather satellite can see the whole national park, from the forests in the south near Scarborough to the heather-covered moorland just south-east of Middlesbrough.When Richard Darn walks these hills - on a clear night - he can't quite make out NOAA-20 as it scurries from pole to pole because the skyglow from Middlesbrough pollutes the darkness. Yet down in the southern forests, the night sky is pristine and ideal for satellite spotting. Places with truly dark skies like this are shrinking. In the areas where you can see why the ancients decided that a group of stars looked like a great bear, or scorpion, or Orion the hunter, the faintest dots of the constellations are being drowned in skyglow, or winked out by a brash neon sign or stray security light. Continue reading...
Zdroj: The Guardian

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