The Light Pollution Map

The loss of dark skies is so painful, astronomers coined a term for it – ‘Noctalgia’ is a feature of the modern age.

The Light Pollution Map uses the Bortle Scale to help find places to mitigate noctalgia. Building the world’s most detailed, interactive global light‑pollution map. Visualize Bortle classes, SQM values & certified Dark‑Sky places. Fully mobile‑optimized + free forever. Plan your next stargazing trip.
From 2020 to 2025, artificial brightness ratio changed from 68.96× to 74.59× natural sky brightness. Brightness change: 7.5% decreasing from last year.
NYC – Urban/city sky. Entire sky is brightened. No Milky Way visible, only the brightest constellations can be recognized.
Light Pollution Trends (2006-2025)
Nightime Weather – Recent weather conditions for astronomy observations.

Posted in: Climate Change, Environmental Law

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