Helena Joyce
Light pollution is a human-made alteration of outdoor light levels from those occurring naturally, which can have harmful effects on streetlights, greenhouses, and satellites. To combat this, DarkSky International has created the International Dark Sky Places program, which certifies communities, parks, and protected areas around the world that preserve and protect dark sites through responsible lighting policies. These Dark Sky Places can be found in 22 countries across 6 continents, offering stunning night sky experiences and connecting people to nature. To find these places, online resources such as light pollution maps and stargazing communities provide valuable information for planning trips to areas with minimal light pollution, such as Death Valley National Park in California, Big Bend National Park in Texas, and Glacier National Park in Montana.
| Characteristics | Values |
|---|---|
| Dark Sky Places | Parks, reserves, sanctuaries, and communities |
| Location | Over 160,000 sq. km of protected land and night skies in 22 countries on 6 continents |
| Mission | To restore the nighttime environment and protect communities and wildlife from light pollution |
| Tools | Education, responsible lighting practices, and legislation |
| Benefits | Increased tourism and local economic activity |
| Resources | Light pollution maps, stargazing communities, and Dark Sky Place finder tools |
| Examples | Death Valley National Park in California, Glacier National Park in Montana, Big Bend National Park in Texas, Blue Mountains in Australia |
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What You'll Learn
International Dark Sky Places
The International Dark Sky Places (IDSP) program certifies communities, parks, and protected areas around the world that preserve and protect dark sites through responsible lighting policies and public education. Dark Sky International has certified more than 200 places since Flagstaff, Arizona, was named the first International Dark Sky City in 2001. Currently, there are 201 certified Dark Sky Places globally, spread across 22 countries on 6 continents.
The program offers five types of designations: International Dark Sky Communities, International Dark Sky Parks, International Dark Sky Reserves, International Dark Sky Sanctuaries, and Urban Night Sky Places.
International Dark Sky Communities are legally organized cities and towns that adopt quality outdoor lighting ordinances and educate residents about the importance of dark skies. International Dark Sky Parks are publicly or privately owned conservation areas that implement good outdoor lighting and provide dark sky programs for visitors. International Dark Sky Reserves consist of a dark "core" zone surrounded by a populated periphery where policies are enacted to protect the darkness of the core. International Dark Sky Sanctuaries are the most remote and darkest places in the world, whose conservation state is most fragile.
Urban Night Sky Places do not fall into any other category but are recognized for their efforts to educate the public on the benefits of proper outdoor lighting. These can include municipal parks, open spaces, or similar properties near or surrounded by an urban environment, whose planning and design actively promote an authentic nighttime experience.
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Dark Sky Communities
The night sky is a naturally, culturally, and historically important resource that is worthy of conservation. The International Dark Sky Places program recognizes communities, parks, and protected areas that preserve and protect dark sites through responsible lighting policies and public outreach.
International Dark Sky Communities are legally organized cities and towns that adopt quality outdoor lighting ordinances and educate residents about the importance of dark skies. These communities are designated by the International Dark-Sky Association, which recognizes exceptional preservation of the night sky through effective lighting regulations, public outreach and education, and citizen support. Examples of certified Dark Sky Communities include:
- Towns of Norwood, and Nucla/Naturita in San Miguel County, CO
- Arizona Sky Village in Portal, AZ
- Fountain Hills, AZ
- Cave Creek, AZ
- Astronomy Village in Chiefland, Florida
In addition to communities, the International Dark Sky Places program also recognizes Dark Sky Parks, Reserves, Sanctuaries, and Urban Night Sky Places. These designations protect ecologically sensitive areas and our universal heritage in the starry night sky, ensuring that citizens can enjoy the beauty of a starry sky.
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Urban Night Sky Places
Light pollution is a human-made alteration of outdoor light levels from those occurring naturally. The International Dark Sky Places program certifies communities, parks, and protected areas that preserve and protect dark sites through responsible lighting policies.
- Death Valley, California: With extreme landscapes and very little light pollution, Death Valley National Park offers a stunning view of the night sky. The Dark Sky Festival, held annually in late winter or early spring, is a great time to visit and connect with fellow stargazers.
- Blue Mountains, Australia: Located just up the hill from Sydney, the Blue Mountains are home to some of Australia's most breathtaking natural attractions. The dark skies here provide an opportunity to experience the beauty of the stars in a setting that is conveniently accessible from a major city.
- Big Bend National Park, Texas: This remote and ruggedly beautiful park in southwest Texas is a six-hour drive from San Antonio, the nearest city. With very little light pollution, it offers a remarkable stargazing experience.
- Glacier National Park, Montana: Known for its pristine lakes and Rocky Mountains, Glacier National Park shares the International Dark Sky Park title with Waterton Lakes National Park in Canada. Visitors can enjoy the dark skies from one of the park's excellent campgrounds.
These Urban Night Sky Places offer a unique opportunity to connect with nature and experience the night sky in areas that are relatively accessible, fostering a greater appreciation for the preservation of our universal heritage in the starry night sky.
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Dark Sky Sanctuaries
Light pollution is a human-made alteration of outdoor light levels from those occurring naturally. It has harmful effects on streetlights, greenhouses, and satellites, among other sources. Dark Sky Sanctuaries are some of the most remote and darkest locations in the world. These sites are dedicated to the conservation of the flora and fauna in the area and the preservation of dark skies.
As of January 2023, there are 16 certified Dark Sky Sanctuaries globally, with half of these located in the US. Dark Sky Sanctuaries differ from Dark Sky Parks or Reserves in that they are typically situated in very remote locations with few, if any, nearby threats to the quality of their dark night skies. The geographic isolation of these places significantly limits opportunities for outreach, so this designation is designed to increase awareness of these sites and promote their long-term conservation.
The Gabriela Mistral Dark Sky Sanctuary in the Elqui Valley of Chile was designated as the world's first International Dark Sky Sanctuary in 2015. Other Dark Sky Sanctuaries include the island of Rùm in the Hebrides, which was declared a Dark Sky Sanctuary in 2024, and the Blue Mountains in Australia.
To find other places with minimal light pollution, you can refer to light pollution maps such as the one on Astrospheric or Dark Site Finder. These maps can help you locate dark skies near you and provide information on clear horizons, safety, and other factors for a successful stargazing experience.
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Light pollution maps
One such scale is the Bortle Scale, a standard method for measuring the darkness of the night sky. It ranges from Class 1 (pitch black) to Class 9 (heavily light-polluted). The Bortle Scale is used by websites like LightPollutionMap.app, which provides a global light pollution map covering most countries and regions. This website combines light pollution data with geographical information to help users find optimal spots for Milky Way observation and astrophotography. It also offers a Chinese version at Darkmap.cn.
Another useful resource is Dark Site Finder, which features a light pollution map with an overlay that can be adjusted using an opacity slider. This map helps users escape artificial skyglow and find dark skies near them. Additionally, Dark Site Finder provides a listing of dark sites, which can be helpful for stargazers planning their trips and looking for safe and accessible locations.
The Astrospheric website is also mentioned as a resource for checking light pollution levels. It includes a light bulb icon that shows a light pollution overlay for specific locations, along with other weather information to help plan stargazing trips.
These light pollution maps and associated resources are valuable tools for anyone seeking to escape light pollution and find pristine night skies for stargazing, astronomy, or photography pursuits. They guide users towards locations where they can fully appreciate the natural beauty of the starry night sky.
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Frequently asked questions
There are many places around the world with minimal light pollution. Some of the darkest places in the US include:
- Big Bend National Park, Texas
- Death Valley National Park, California
- Glacier National Park, Montana
You can also check out Dark Sky Places, which certifies communities, parks, and protected areas around the world that preserve and protect dark sites through responsible lighting policies. There are over 160,000 square kilometres of Dark Sky Places in 22 countries on 6 continents.
Light pollution is the human-made alteration of outdoor light levels from those occurring naturally. Sources of light pollution include streetlights, greenhouses, and satellites.
You can use light pollution maps to find dark skies near you. Websites like Dark Site Finder have interactive maps that allow you to search for dark sites and plan your stargazing trip.
Organisations like DarkSky work to restore the nighttime environment and protect communities and wildlife from light pollution. They advocate for responsible lighting practices and support legislation to reduce light pollution. The International Astronomical Union has also recommended that governments establish 'Dark Sky Oases' to protect the night sky as a natural resource.
