Light pollution map
The glow of every city, from the 2024 World Atlas of night sky brightness. Tap anywhere for an approximate Bortle class and tonight's score. Green dots are DarkSky International certified places (245 worldwide).
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Map data © OpenStreetMap contributors. Glow layer & Bortle values: David Lorenz 2024 atlas / EOG VIIRS (CC BY 4.0) — modelled zenith brightness, block-averaged to ~7 km for the raster layer; point taps query the full-resolution atlas. Approximate, not a field measurement.