1. New England Light Pollution Advisory Group (NELPAG) Everything to do with the problem in New England. Lots of links. Includes information on how to subscribe to the NELPAG forum. http://cfa-www.harvard.edu/cfa/ps/nelpag.html

The New England Light Pollution Advisory Group The New England Light Pollution Advisory Group (NELPAG) A big role of NELPAG has been providing information through this Website since early 1995, with hundreds of accesses to this page being logged every week for the past couple of years (as of August 1997, we counted more than 47,000 accesses to this page; our best week so far was the one ending 1997 May 4, when 766 accesses to this page were recorded in that week alone). [As of August 1999, we are still getting 400-600 accesses per week, with over 100,000 estimated accesses to these NELPAG web pages since 1995.] We have found that there is a great public demand for information on outdoor-lighting issues, and that there has been unfortunately a great dearth of sources that the interested individual can seek out. It should not be surprising, then, that we have received high praise from many people around the world for the information provided here. Imagine children growing up without being allowed to see trees or birds (or any other aspect of nature): now, how is this any different from preventing our children from seeing the stars?! But by our thoughtless erection of outdoor lights everywhere - without consideration of glare and light trespass, without consideration of safety, without consideration of the right to privacy, and without consideration of the energy waste and the waste of taxpayer dollars - we are making it so that a very small percentage of children are able to grow up in the world today with the ability to see and ponder the wonders of our beautiful starry night sky. Indeed, after a full century now of outdoor electrical lighting, one must wonder what a lot of the lighting manufacturers and installers were

2. Light Pollution Information -- Astronomical Society Of Greater Hartford Learn how glare can affect anyone with this concise information page collated by the Astronomical Society of Greater Hartford. Includes lots of links. http://members.aol.com/copernicanview/

LIGHT POLLUTION INFORMATION Brought to you thru the auspices of the ASTRONOMICAL SOCIETY OF GREATER HARTFORD Above: Urbanization map of the United States derived from city lights data. Urban areas are colored red, while peri-urban areas are colored yellow. (Image courtesy Mark Imhoff, NASA GSFC) Index Home Books Glare Links ... Awards Visit! The Astronomical Society of Greater Hartford is a club member of the International Dark-Sky Association The members of the Light Pollution Education Committee work hard to raise awareness of the Society members and the general public to inform them about the effects that obtrusive outdoor lighting have on society. Light Pollution affects astronomers more profoundly in one way because it greatly diminishes, if not completely removes the view of deep sky objects in the cosmos, but the Light Pollution affects everyone! Join! What is Light Pollution? How could light ever pollute something? It disappears as soon as the lamp is turned off and no sticky toxic residue is left in its wake. This cannot be a form of pollution, can it? The answer is yes, light can actually pollute the outdoor environment and wash away the view of stars in the sky. As awareness raises around the world, this term is heard in more and more places. It is a curable problem and can be prevented through the application of well designed and applied outdoor lighting. Light Pollution occurs in the three following forms: It causes an atmospheric phenomenon known as skyglow. Have you ever noticed the clouds overhead glowing an eerie pink, white, or orange color before? This wasted light is known as skyglow. It happens because of poorly designed and improperly aimed light fixtures called luminaires. Luminaires that do not offer adequate shielding usually spill wasted light into the sky and across property lines where it does not benefit anyone. When light spills into the sky, it reflects off of tiny airborne dust and moisture particles. This happens even on very clear evenings, too. The skyglow phenomenon directly affects the scientific research of amateur and professional astronomers. It also affects everyone else who simply enjoys a dark night sky abundant with stars overhead. Skyglow is a curable condition, and we can still have adequate and safe illumination in the outdoor environment.

3. Light Pollution And Narrow-Band Filters Review of different filters available on the market for improving views of various DeepSky objects. http://www.prairieastronomyclub.org/filters.htm

SOME AVAILABLE LIGHT POLLUTION AND NARROW-BAND FILTERS by Dave Knisely There are a number of different filters available on the market today for improving the views of various Deep-Sky objects, with most coming in one of three classes: 1. Broad-Band "light pollution" filters, 2. Narrow-Band "Nebula" filters, and 3: Line filters. The broad-band "Light Pollution Reduction" (LPR) filters are designed to improve the visibility of a variety of Deep-Sky objects by blocking out the common Mercury vapor, Sodium, and some other emission lines from man-made or natural sources which contribute to light pollution, while letting through a broad range of other more useful wavelengths. Since the eye is mainly a "contrast detector", this selective screening out of some of the background skyglow increases the contrast and helps Deep-sky objects stand out more noticably. While these filters do not eliminate the effects of light pollution or make the objects brighter, in many cases, these filters can improve the visibility of some deep-sky objects to at least some degree. In addition, larger versions of these broadband filters which fit over camera lenses can be somewhat useful for photography of wide star fields when some skyglow is present. For recommendations, I like the Lumicon UHC or Orion Ultrablock (whichever is less expensive at the time), and the Lumicon OIII, but remember to use them with an eye that is properly dark adapted and employ averted vision. Filters won't make the objects brighter, but in many cases, they will make many of them a lot easier to see. Have fun!

4. Light Pollution, The Neglected Problem A short article explaining the problem which appeared in the Winter 1994 issue of the ANJEC Report. http://www.monmouth.com/~ksears/litepol1.htm

Light Pollution: The Neglected Problem By John Batinsey Member, Eatontown, New Jersey, Environmental Commission A version of this article appeared with the same title in the Winter 1994 issue of ANJEC Report. Do you sometimes find yourself squinting at night just to see the roadway? Do you ever wonder why that is? Surely all the glare and obtrusive light causing this loss of visibility must be necessary-part of civilization. After researching the causes of light pollution, the Eatontown Environmental Commission realized that we can have effective outdoor lighting without these problems. As a result, Eatontown adopted a comprehensive outdoor lighting ordinance whose goals are to reduce unnecessary glare, thereby improving night-time visibility for safety and security. The ordinance will also help reduce unnecessary sky glow. Most of these improvements will even save energy, as well as reduce cost. ENERGY SAVINGS Much of the outdoor lighting that we see at night wastes energy in the following different ways: by excessive illumination, by unshielded or misaligned light fixtures, and by inefficient lamp sources. EXCESSIVE ILLUMINATION.

5. Light Pollution The best way to describe light pollution is to give you a couple of examples. Here at the NJAA we have a full time light pollution Chairman that goes http://www.njaa.org/light.html

Light Pollution What's light pollution? Click here and see Clinton Township Lighting Ordinance I know many non-amateur astronomers are saying "Huh? What's that?" The best way to describe Light Pollution is to give you a couple of examples. While driving on any highway or road at night, do you have to squint from the glare as you approach street lights? Does the street light in front of your house shine into your windows to the point where you need the blinds down to sleep at night? Does your neighbors light on his back porch light up YOUR back yard ? When you look up at the sky on a cloudy night, can you see the clouds? Well if you've answered yes to any of these questions you've experienced light pollution. What are the adverse impacts of poor night time lighting? Urban Sky Glow : Just because we're 50+ miles from NYC doesn't mean we're rural anymore. Look around! Urban sky glow is destroying the rural look of Hunterdon County and our view of the universe. We don't live in the clouds; we don't need to light them. Direct Glare : Direct glare is defined as the visual discomfort resulting from insufficiently shielded light sources in the field of view. One should "see the effect, not the light source". Use of the term "direct glare" is recommended in lieu of the word "glare" alone. The direct glare definition means if you can see an unshielded lamp, or the luminaire maximum candlepower zone, you may well have glare. However, usually when you are near a luminaire, you will see these parameters, of course. So a reasonable definition limiting the field of view is required.

6. Light Pollution light pollution is included in the Clean Neighbourhoods and Environment Act For instance on the light pollution maps of the UK one of the darkest places http://www.croydonastro.org.uk/lights.htm

The Croydon Astronomical Society Light Pollution Campaigns to control light pollution Update 25th April 2005 Light Pollution is included in the Clean Neighbourhoods and Environment Act "Q. When will the other measures in the Act come into effect? A. We are aiming for the other measures in the Act to come into effect in 2006, once all the necessary guidance and regulations have been produced. The exact date will be a decision for the new Government formed after the general election, but is unlikely to be any earlier than April 2006." So we may have to wait another year ! More details here from the DEFRA web site. Proposal that Light Pollution is included in the Clean Neighbourhoods and Environment Bill The government have proposed that Light Pollution should be included in the Clean Neighbourhoods and Environment Bill presently before Parliament. While this is a step in the right direction the proposed bill contains a number of exceptions that could result in considerable dilution of the effectiveness of these controls. The proposed changes to the Environment Bill are shown below.

7. Prairie Astronomy Club: Light Pollution Fact Sheet A basic fact sheet on light pollution, with terms explained in layman s language. Provided by the Prairie Astronomy Club. http://www.prairieastronomyclub.org/light.htm

Light Pollution Fact Sheet Our goal is to encourage quality lighting! We are NOT against night lighting. The 100 inch diameter telescope at Mt. Wilson Observatory, which overlooks the Los Angelas basin, is only 11% as effective as when it was built. This telescope is severely limited in its research capabilities because of light pollution. 1 billion dollars ($1,000,000,000) is wasted each year in the United States by lighting up the sky. This wasted light serves no purpose for safety, security or utility......it is simply wasted energy! We want to start NOW to preserve as best as we can the sky above Holmes Park and Hyde Observatory. Components of light pollution include: Light trespass - Spill light coming from another property. Glare - From seeing the bright filament of an unshielded light, troublesome and dangerous. Clutter - Excessive grouping of lights, causes confusion as well. Energy waste - Costing us over One Billion Dollars a year in the U.S.A. alone. Urban sky glow - Domes of light over cities. Blocks out faint objects such as the Milky Way, Nebula and distant galaxies. Only a few bright stars can be seen from the city. SOME TYPES OF LAMPS: Low Pressure Sodium (LPS) fixture produces a yellow tint.

8. Light Pollution Information about the fight against light pollution in Yerkes, William s bay. Includes pictures, ordinances, presentations and links. http://astro.uchicago.edu/home/web/rhe/Astronomy/lightpollution.html

Yerkes Observatory and Light Pollution The night-time sky at Yerkes has become increasingly brighter over the last 15 years, due to light pollution. Measurements made in the spring of 1998 showed the sky brightness measured at a 70 degree elevation to be about twice what they were 10 years before. I had noticed that, between 1995 and 1998, the darkness had deteriorated to the extent that I no longer needed a torch (flashlight) to walk home after sunset. In August of 1998 I took a series of horizon pictures from the catwalk of the 40-inch refractor. These pictures were taken just after midnight on a moonless night, with an f/3.5 aperture and 2-minute exposures on ISO 200 film. The pictures below show (going from left to right) the views looking (i) South-West, (ii) South-East, (iii) East and (iv) North-West. Click on a thumbnail for a larger version. As can be seen, the sky is pretty bright. The most suprising thing was to find that the darkest part of the horizon is looking towards the South-East, which is the direction of Chicago! Clearly our light pollution problem is dominated by light from the local communities. In February of 1999 I approached the Williams Bay village board to see if I could give them a presentation on this problem. Williams Bay had a section in its building code on lighting, but it was very limited in its scope and was largely being ignored. In March I gave a presentation to the Village Board which received a favourable response. Over the spring and summer of 1999 I drafted a lighting ordinanace with their input, and this was adopted by Williams Bay in September of 1999.

9. EMU Astro Club-Light Pollution Essays on the causes and effects of light pollution, as well as information about local regulations to combat the problem. http://www.physics.emich.edu/sherzer/lightpol.htm

Our Vanishing Night Earth at Night - NASA image (click on image to enlarge) Erosion of the Night Sky from Light Pollution "I remember camping as a kid when we could see so many stars you couldn't tell one constellation from the next, and the Milky Way was a river of light". "It was so dark you could hardly see your hand in front of your face, and I saw my shadow on the ground from Venus!" The lucky ones among us have probably made these claims, but sights such as this are becoming increasingly rare. Only a generation ago, many could still see the Milky Way from their backyards. Unfortunately, the overuse and poor quality of modern outdoor lighting is fast destroying a valuable natural resource - a dark nighttime sky. The light pollution that results from this misuse is, however, the easiest of pollution sources to fix. Please read on.... turned off when not in use and the CPU energy star compliant) The Culprits: Poorly designed streetlighting - The next time you see the late evening news, notice the "tower camera" views TV stations often use. Then ask two simple questions: Why is the night sky orange instead of black? And, why are so many lights visible from the top of the building tower and from miles away? Generally, if you can see a fixture's light source from more than a hundred yards away, it's a bad fixture. Decades old designs such as cobra-style and

10. Light Pollution Authority Home Page - Www.darksky.org light pollution destroys the night sky. IDA strives to be effective in halting the adverse environmental impact of light pollution on dark skies by building http://www.darksky.org/

International Dark-Sky Association "To preserve and protect the nighttime environment and our heritage of dark skies through quality outdoor lighting." Keyword Index Site Users Guide Site Map Search the Site 30 AUG 2005 About IDA Support IDA Membership Newsroom ... then who? HTML 4.01 GNAT Homepage Light Pollution: Any adverse effect of man-made light including sky glow, glare, light trespass, light clutter, decreased visibility at night, and energy waste. You Have the Opportunity to Help Us Save the Stars! Please Support IDA STORE If you value dark skies, please consider joining or giving to IDA. Your employer may even Match your Gift Carpe Noctem - Seize the Night! Are You Interested in... Lighting Regulations IDA Store Fixtures Environment Education Dark Sky Finder Information Sheets Security Health Questions? Contact Us Images IDA Fall Meeting Sept. 16 - 17th in Yellowstone National Park News of Interest Newsletter #62 June 2005 Now on line as High/Low Resolution PDFs Need a past issue?

11. Light Pollution Authority Home Page - Www.darksky.org light pollution destroys the night sky. IDA strives to be effective in halting the adverse environmental impact of light pollution on dark skies by http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

12. The Light Pollution Authority - Www.darksky.org International DarkSky Association To preserve and protect the nighttime environment and our heritage of dark skies through quality outdoor lighting. http://www.darksky.org/ida/

Text Link Site Users Guide Quick Links Search the Site ... Site Map International Dark-Sky Association " To preserve and protect the nighttime environment and our heritage of dark skies through quality outdoor lighting." 02 MAY 2002 About IDA Newsroom Education Meetings ... GNAT Web Site Welcome to the IDA home page. The IDA is a non-profit, membership-based organization. This is an introduction page please Continue Here or use the Navigation Bar or Logo. You are at this page because you browser does not support java or java is disabled. Language Translation by Google and SYSTRAN International Dark-Sky Association 3225 N. First Ave., Tucson AZ 85719 USA (520) 293-3198 (voice) (520) 293-3192 (fax) E-Mail: ida@darksky.org Send Comments to webmaster@darksky.org s_index.html www.darksky.org/index.html

13. RASC LPAP Explains how the problem is and can be tackled in Canada with the LPAP. Contains helpful Canadian information. http://www.rasc.ca/light/

RASC Light Pollution Abatement Program TABLE OF CONTENTS LPAP Program Mission Other Organisations LPAC Committee ... Reports to Council

14. The Light Pollution Authority - Www.darksky.org International DarkSky Association " To preserve and protect the nighttime environment and our heritage of dark skies through quality outdoor http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

15. Light Pollution Awareness Website Learn about the scourge of the millennium known as light pollution. light pollution occurs when too much light shines into the sky. http://members.aol.com/ctstarwchr/

Welcome to the Light Pollution Awareness Website! This site has been relocated. If your browser does not transit to the new location in a few seconds please click the following URL... http://members.aol.com/ctcadman/index.htm Remember to update your bookmarks or links.

16. Astronomical Society Of Rowan County Space news, astrophotography, light pollution, and printable maps. http://members.dialstar.com/asrc/

This web site is rated safe for all audiences by RSACi and the International Web Police. Astronomical Society of Rowan County ASRC's Web Site Last updated October 30, 2004, Check back to see when the next meeting will be, it changes every month, so check back frequently. If your reading this you first need to update your browser so you can see our main site which uses FRAMES. There are astronomy clubs throughout the world and we hope you have access to one in your area. If you would care to attend one of our meetings or star parties, contact the A.S.R.C. to find out when our next meeting will be held and instructions on how to get here by: E-Mail- herbgoodman@hotmail.com Phone- (704)636-1399 Ellen Trexler Mail- Astronomical Society of Rowan County, 3021 Old Mocksville Rd. Salisbury NC 28144 The ASRC also adheres to the concept set forth by the IDA regarding outdoor lighting and light pollution. We need your help in saving our view of the stars, light pollution is hindering you ability to see meteors, asteroids, and the stars above, for no reason. We can have properly shielded lights and still have safe streets and homes. If you don't live in the Salisbury/Rowan area, look for a astronomy club near you for more information on what you can do to help the IDA and other astronomy clubs pursue their interests in the science of "star surfing". Use Yahoo if you need help locating astronomy clubs near you. You can also check and see when the next asteroid will strike the Earth, or if a nova or super nova has happened recently.

17. Light Pollution Awareness Website Learn about the scourge of the millennium known as light pollution. light pollution occurs when too much light shines into the sky. Light Trespass http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

18. Utah Skies Astronomy Web Pages | The Amateur Astronomer's Resource A very comprehensive collection of information useful and interesting to amateur astronomers, especially those located in Utah. Includes events, news, data and reference materials, and a weekly viewing conditions forecast. Has a special section about light pollution. http://www.utahskies.org/

"View-tah's" Astronomy Web Pages Bringing the Joys of Astronomy to the Public Through Awareness, Advocacy, and Education Free Utah Skies Subscription "Talent hits a target no one else can hit; Genius hits a target no one else can see." Arthur Schopenhauer (1788-1860) Sponsors Starry Night Lights Snyderville Basin Special Recreation District Swaner Nature Preserve CARG APOD Space Weather IDA Thursday's Classroom Thursday, September 22nd, 2005 Autumnal Equinox Today ( actually , about 11:30pm tonight) marks the astronomical beginning of autumn in the northern hemisphere. This beautiful image taken on the 20th shows that the trees around Park City had gotten a head start on the fall season Wednesday, September 21st, 2005 Lunar Alps The European Space Agency's SMART-1 spacecraft recently snapped this beautiful shot of the lunar Alps. Created in an instant after a tremendous collision about 4 billion years ago, The Lunar Alps rise over 3000 meters. The huge crater at the bottom of the image is known as Vallis Alpes or Alpine Valley. Note the lava channel that bisects the crater. Checkout ESA News for more details.

19. Light Pollution Information Astronomical Society Of Greater Learn about the scourge of the new millennium known as light pollution. light pollution occurs when too much light shines into the sky. Light http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

20. The Night Sky In The World Scientific data, informations, atlases and other on light pollution,night sky brightness,sky glow, nightime lights,naked eye visible stars,limiting http://www.inquinamentoluminoso.it/dmsp/

Istituto di Scienza e Tecnologia dell'Inquinamento Luminoso Light Pollution Science and Technology Institute The night sky in the World Home Page How we surveil the situation of the night sky with satellites The DMSP satellite and its Operational Linescan System The World Atlas of sea level artificial night sky brightness ... The night sky live All rights reserved The night sky in the World Satellite monitoring of the artificial night sky brightness and the stellar visibility The interest for the protection of the night sky from light pollution is growing every day. A global scale periodic monitoring of the situation is necessary. Nighttime images of the Earth at night have been obtained from the Defense Metereological Satellite Program (DMSP) of the US Air Force since early '70. The first global image was obtained by Woodruff Sullivan in late '80. These images only showed the geographic distribution of the sources on the Earth surface because the satellite detectors were saturated by the strong flux emitted by them and no quantitative measurements were possible. Since 1998 unsaturated data become available, allowing quantitative measurements of the upward light flux emitted by sources.

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