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Night sky brightness rising nearly 10% annually, studies find

Research cited by The Guardian shows the average night sky brightened by about 9.6% per year between 2011 and 2022, roughly doubling every eight years. A separate study found four in five people now live under light-polluted skies, largely due to LED lighting and satellite-reflected sunlight.

techspot.com · 2026-09-30

Opinion piece argues night sky brightness is rising 10% annually due to light pollution

A Guardian opinion column, cited via Slashdot, states that the night sky is growing 10% brighter each year and that 80% of people now live under light-polluted skies. The author argues for treating access to darkness as a right, calling for rules on light warmth, direction, and brightness rather than eliminating outdoor lighting entirely.

science.slashdot.org · 2026-09-30