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CC_Minutes_2005_0620
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Roseville City Council
Document Type
Council Minutes
Meeting Date
6/20/2005
Meeting Type
Regular
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<br />Light Pollution Authority Home Page - www.darksky.org <br /> <br />Page 3 of3 <br /> <br />disappeared.The problem is urban sky glow, due mostly to too much bad lighting. With good lighting, we all win. ... <br /> <br />I~H07, The Return of the Night" by Harrell Guy Graham <br />"Imagine a night sky where there are so many twinkling stars you can hardly begin to count them. Then imagine that same night sky <br />lit. not by starlight, but by light pollution from thousands upon thousands of unshielded high intensity outdoor lights. VVhere there <br />were once countless stars, you can now see an unnatural glow smearing the night sky with a haze of extraordinarily bright artificial <br />light." ..,"Because of light pollution, no stars whatsoever are visible any where nth horizon in most American communities." . <br /> <br />15-111, Impressions of a Night Sky Unaffected by Light Pollution <br />Words can scarcely describe what it is like to see a night sky that is unaffected by light pollution. For many, it is a spiritual <br />experience. Many of us dream of walking out our back door and being engulfed by a night sky so beautiful, so splendid, so <br />overwhelming, that a telescope is not even required to appreciate it. Our ancestors knew such a sky. Without our vigilance, our <br />children and thejr children will noUt is up to our generation to bring back: the night.. It is good for all of us who are active in the <br />fight against light pollution to occasionally experience a night sky unaffected by light pollution at least once each year to energize <br />and inspire us to continue our diligent efforts to curtail light pollution. Here, now, are some general impressions of a night sky that <br />is unaffected by light pollution. <br /> <br />1$-120, Light Pollution and Limiting Magnitude <br />How faint a star can be seen with the unaided eye? This depends on the ability and experience of the observer, the state of dark <br />adaptation of the observer, the sky brightness due to light pollution from electric lights and natural sources such as the Moon, and <br />the clarity of the sky. ... There are about 14,000 stars brighter than magnitude +7.0, so under ideal conditions an observer could see <br />somewhat under half ofthem{-7,000) due to only half the sky being visible and atmospheric extinction. A magnitude +6.0 sky is still <br />a reasonably good sky, with -2,400 stars visible to the unaided eye. There is some light pollution, and it is usually enough to <br />illuminate clouds so that they no longer appear utterly black against the sky as with a magnitude +7.0 sky. The brighter parts of the <br />Milky Way are still readily seen. <br />Less than 250 stars are visible in a magnitude +4.0 sky, and the milky Way is never visible. Ligl)t pollution is a serious problem. A <br />magnitude +3.0 sky will show fewer than 50 stars, and light pollution is severe. This is the typical sky encountered inside a major <br />city. <br /> <br />1$-1 ~1, New Jersey Light Pollution Study Commission Recommendations <br />The New Jersey Light Pollution Study Commission, after meeting for almost ten months, has completed and submitted its report to <br />the Governor and legislature. The commission has determined that "the causes of light pollution are many and the effect can be <br />glare, energy waste,light trespass(nuisance light), and sky glow."Clearty, light pollution affects everyone. The twelve <br />recommendations in the report are intended to reduce light pollution and its adverse effects. These recommendations will result in <br />improved lighting conditions for safety and for reduced energy consumption, and will also serve as a means to help preserve the <br />environment. . <br /> <br />IS-131 , Light Pollution: Are You a Culprit? <br />AbstractMany electrical engineers and contractors,architects, and lighting engineers cause light pollution simply because they do <br />not think about it. This article examines the problem, possible future limitations, and some solutions. ... There has been increasing <br />worldwide awareness of light pollution since the early 1980s. The Australians decided in 1981 to produce a National Standard to <br />limit light pollution. <br /> <br />15,134, Light Pollution: The Problem, The Solutions <br />Abstract The problem of light pollution exists most everywhere, and it is still growing rapidly. <br /> <br />15-139, Why Should a City Government Be Concerned About Light Pollution <br />The public's loss of the stars from the nighttime sky is a real tragedy that every city government should be aware of and not <br />allow.This loss is a testament to our myopia and to our growing insulation from the natural world. Like the canary in the mine shafts <br />of old,astronomers are warning us of the unnecessary loss of a dark nighttime sky in almost every urban area. ... Light pollution <br />represents a waste of a magnitude that almost no homeowner would allow inside their homes. <br /> <br />Top of Page <br /> <br />Join the campaign to stop Light Pollution Now! <br /> <br />index.html <br /> <br />www.darksky.org/index.html <br /> <br />http://www .darksky .org/ <br /> <br />6/20/2005 <br />
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