Urban night sky brightness is primarily caused by artificial light pollution scattering through the lower atmosphere

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Evidence from multiple studies confirms that urban night sky brightness (skyglow) is caused by artificial light scattering through the Earth's lower atmosphere, involving interactions with air molecules, aerosols, and clouds.

The analysis

The claim specifically addresses the physical cause of urban night sky brightness, attributing it to artificial light pollution scattering through the lower atmosphere. The retrieved literature directly supports this premise by examining radiative transfer models of light scattering (Paper 0), air pollution and aerosol scattering contributions to night sky brightness (Paper 2), and satellite verification of atmospheric light scattering around cities (Paper 3). There are no papers refuting this well-established physical mechanism.

Evidence for · 3

The propagation of light pollution in the atmosphere

Recorded source metadata

P. Cinzano, Fabio Falchi Istituto di Scienza e Tecnologia dell'Inqui Luminoso, Italy., CieloBuio, Coordinamento per la protezione del cielo notturno. The propagation of light pollution in the atmosphere. 2012. https://doi.org/10.1111/j.1365-2966.2012.21884.x

Paper 0 details radiative transfer and scattering models (such as Extended Garstang Models) used to calculate how artificial light propagates through the atmosphere to create night sky brightness.

Source citation format

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More for · 2

Air pollution mitigation can reduce the brightness of the night sky in and near cities.

Recorded source metadata

Kocifaj M, Barentine JC. Air pollution mitigation can reduce the brightness of the night sky in and near cities.. 2021. https://doi.org/10.1038/s41598-021-94241-1

Paper 2 notes that skyglow is the direct result of outdoor artificial light at night interacting with atmospheric scattering from air pollutants like aerosols.

Source citation format

The nature of the diffuse light near cities detected in nighttime satellite imagery.

Recorded source metadata

Sanchez de Miguel A, Kyba CCM, Zamorano J, Gallego J, Gaston KJ. The nature of the diffuse light near cities detected in nighttime satellite imagery.. 2020. https://doi.org/10.1038/s41598-020-64673-2

Paper 3 demonstrates that diffuse glow around cities, often detected in satellite imagery, represents real atmospheric scattering of urban light.

Source citation format

The paper trail · every fact has a biography

first checked02 Aug 2026

judged → SUPPORTED · 8702 Aug 2026

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