Light pollution map.
About NoctisExplore 2025 satellite light data. Zoom in to see the light around towns and darker places beyond them.
Light pollution readings appear here.
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Coordinates and data information
NASA Black Marble VNP46A4, 2025 annual composite. 58 regional datasets. The overview uses 2 arc-minute averages; zooming in reveals original 15 arc-second cells (about 460 m north–south). Detailed readings show the radiance range of each cell’s estimated class, rather than an averaged point value. Bortle classes are Noctis estimates from upward radiance, not ground measurements or a live forecast. Regional coverage is not worldwide. The map is for comparing sky conditions, not road navigation.
NASA data source · How to read the map
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