Published 2026-05-17 · data 2016 · people
A third of humanity cannot see the Milky Way
Artificial light at night washes out stars — and disrupts wildlife and sleep.
Roughly one in three people cannot see the Milky Way from home: 33% of the world's population lives under skies washed out by artificial light. The 2016 global atlas of night-sky brightness found about 83% of humanity under light-polluted skies. The stakes go beyond stargazing — the same glow disrupts wildlife and sleep.
1 cell = 8.2 million people (0.1% of world population) · 1,000 cells
Context
The numbers come from the world atlas of artificial night-sky brightness, published in Science Advances in 2016 by Falchi and colleagues. It mapped skyglow across the globe to estimate how many people have lost sight of the stars.
The 33% band counts people whose night sky is bright enough to hide the Milky Way completely; the other 67% can still find it. Light pollution, in other words, dims the night long before it erases the galaxy.
The atlas dates to 2016, so the shares describe the world as mapped then. Its authors framed the glow as more than an astronomical problem: artificial light at night also disrupts wildlife and sleep.
Falchi et al. Science Advances 2016: ~83% world population lives under light-polluted skies; ~33% cannot see Milky Way.
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