Due to light pollution, the number of stars visible to the naked eye in the night sky is being reduced by more than half in some places in less than 20 years,
Light pollution is obstructing those stars and is expanding far more quickly than scientists had realised.
Stars could be invisible within two decades, scientists warn
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Stars to become invisible to our eyes in two decades due to light
Visibility of stars in the night sky declines faster than previously thought
Uncovering Our Night Skies (U.S. National Park Service)
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Stars could be invisible within 20 years as light pollution
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