Context:
Light pollution is increasingly affecting some of the world’s clearest skies, including Chile’s Atacama Desert, a major hub for astronomical research. Rising urbanisation and industrial activity are degrading ideal observing conditions.
- Light pollution refers to excessive or misdirected artificial light that brightens the night sky.
- It reduces visibility of celestial objects and affects astronomical observations.
- Ideal observation sites require dry climate, high altitude, low humidity, and minimal light pollution.
- Atacama Desert (Chile) is one of the best locations due to clear skies and over 300 cloudless nights/year.
- Hosts major observatories like Paranal Observatory and projects like Extremely Large Telescope (ELT).
- Expansion of urbanisation, mining, and energy projects increases sky brightness.
- Impacts astronomy, ecosystems, and human circadian rhythms.
- Highlights need for dark sky conservation policies and regulation of artificial lighting.
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Light Pollution Impact: Threat to Astronomy and Dark Skies