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Light pollution harms not just stargazers | csmonitor.com - 0 views

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    But even on a clear night, many would-be astronomers are missing out on this rare celestial scowl, instead being treated to a dull haze punctuated by only the nearest or brightest objects, Jupiter not being one of them. So pervasive is this murky veil that the National Park Service estimates that two-thirds of Americans cannot see the Milky Way from their homes. Had Carl Sagan spent his whole life in a contemporary US city, he'd no doubt have marveled at the dozens and dozens of lights dotting the firmament. The cause of this stellar pall? Carelessly designed streetlamp fixtures, signs, and office lighting controls that pointlessly illuminate the sky, blocking our view of the universe.
Energy Net

National Geographic Magazine - Light Pollution! - 0 views

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    Light pollution in the broad sense refers to any nighttime artificial light that shines where it's not needed. This nocturnal brightness can disorient humans and a host of other animals, confounding eyes and biological rhythms that evolved in a world without such light. One way stray rays pollute is sky glow, the scattering of light by clouds and atmospheric particles that makes it difficult to see stars and other features of the night sky-an increasing problem. These maps show the global extent of sky glow. More than just snapshots of the Earth at night, they account for the light-scattering effects of clouds and dust, and show how bright the sky is above a given point on the ground-revealing that most of the world's population lives under night skies fuzzy with the haze of reflected light.
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