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Post Info TOPIC: Light Pollution, Energy Saving, Astronomy
Blobrana


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Tyler E. Nordgren, an associate professor of physics at University of Redlands and a former astronomer at the U.S. Naval Observatory and Lowell Observatory, in Flagstaff, Arizona, will speak at the April 18 meeting of the San Bernardino Valley Amateur Astronomers at the San Bernardino County Museum in Redlands.

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Blobrana


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Missouri regulates air pollution, water pollution, even noise pollution. But light pollution?
Under a bill filed in the Legislature, Missouri could consider excessive light a pollutant in the night sky.
The bill creates voluntary benchmarks to reduce light pollution in state parks, wilderness areas and military training facilities.

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Blobrana


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Street lights in Cambridgeshire will be dimmed in the early hours from next year to cut carbon emissions and save cash.
The plans for lower lighting levels have emerged during talks over a £57 million scheme to replace thousands of the county's street lamps from 2010.
It will see the installation of 44,000 energy-efficient lamps over a five-year period, which will offer far brighter light than the current yellow sodium lamps.

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Blobrana


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Anyone who has ventured onto the exhaust-filled streets of Java's cities or glimpsed West Java's Citarum River - widely considered one of the world's dirtiest - knows that Indonesia has an air and water pollution problem. Few people are aware, though, of the country's light pollution problem.

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Blobrana


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Light Pollution, Astronomy
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A pristine sky loaded with stars, where you can even see a shadow from brilliant Venus and the Milky Way band glows across the heavens, is a sight you will likely never forget. In our forefathers' day, it was normal to have such a sky, since most people lived in the countryside away from cities smothered in smoke and, eventually, electric light.
In 1900, there were 76.2 million people in the United States, and most people lived in rural areas. At that time, farmers made up 38 percent of the labour force. By 1990, with 261.4 million people, farmers were 2.6 percent of America's labour force. Today the number is more than 305.8 million.
The shift to the city and its growing suburbia has meant more lights shining upward and more people under those lights seeing fewer stars. One might think interest in astronomy would have plummeted.  On the contrary, amateur astronomy has boomed since World War II.

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Blobrana


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A fifth of the world's population can no longer see the Milky Way with the naked eye due to artificial lights blocking out the view of the stars.
This year, which is International Year of Astronomy, a new project is taking place to try to improve the visibility of the stars.
Campaigners at the Dark Skies Awareness project will be lobbying local authorities and members of the public to turn off lights in built-up areas at night.

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Blobrana


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 Some astronomers seem to be willing to say and do just about anything just to get a better look at the heavens, including making city streets safer for criminals.
In a commentary in Nature magazine (Jan. 1) presaging the 2009 International Year of Astronomy, astronomer Malcolm Smith says that it's time for cities to "turn off the lights" so we can better see the Milky Way, conserve energy, protect wildlife and benefit human health. Smith is part of the so-called Dark Skies Awareness project, an international coalition of astronomers and related institutions that wants to "find allies in a common cause to convince authorities and the public that a dark sky is a valuable resource for everyone."

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Blobrana


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Death Valley works to preserve night sky
Acclaimed for its ink black skies, Death Valley, the hottest place in North America, also ranks among the nation's unspoiled stargazing spots. But the vista in recent years has grown blurry. The glitzy neon glow from Las Vegas and its burgeoning bedroom communities is stealing stars from the park's eastern fringe.

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Blobrana


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Just a few miles outside Columbia city limits, an amateur stargazer can see the Ring nebula using just a pair of binoculars. Astronomers using the telescope in Missouri University's Laws Observatory have a bit more trouble.
The bright lights that illuminate Stankowski Field after dark make it difficult for people in the observatory to see far into space when the telescope is pointed south or west.

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Blobrana


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You already know about air pollution and water pollution. Because you're reading an astronomy column, you may have heard about light pollution, too -- that's light from streetlamps, buildings, stadiums, and their luminous ilk that splashes the night sky, obscuring the stars.
But you probably haven't heard of radio pollution. A close cousin of light pollution, radio pollution may be invisible, but it could make astronomers blind to the entire radio universe.

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