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Campaign for Dark Skies
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"The Darkest Parks in the U.S.
Summer nights are worth staying up for at these 7 dark-sky parks"

+IDA - International Dark-Sky Association Dark Sky Parks.

Mark Brehon's profile photo
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"Selected from images taken in 55 countries (during 2013-14), the winners of the 5th Earth & Sky Photo Contest highlight the beauties of night sky and its battle with light pollution."

#lightpollution   #darkskyplaces   #photography  
Faiza Mirza's profile photo
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An article about airglow - the natural glow in the sky at night. Includes photos and an explanation of the different colours.

#darkskies   #airglow   
How to See Airglow, the Green Sheen of Night

Emerald green, fainter than the zodiacal light and visible on dark nights everywhere on Earth, airglow pervades the night sky from equator to pole. Airglow turns up in our time exposure photographs of the night sky as ghostly ripples of aurora-like light about 10-15 degrees above the horizon. Its similarity to the aurora is no coincidence. Both form at around the same altitude of  60-65 miles (100 km) and involve excitation of atoms and molecules, in particular oxygen. But different mechanisms tease them to glow. 

Read more:
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"The thing about LED lights, they are cheaper to run, but they are hard on the eyes and give a glare and glow that can't be screened out."

#lightpollution   #ledlighting  
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Recording of Google hangout about light pollution: Learning Space - Come to the Dark Side

Scott Kardel - +IDA - International Dark-Sky Association 
Connie Walker - NOAO and Globe At Night
+Georgia Bracey  - CosmoQuest Education
+Nicole Gugliucci  - +CosmoQuest 

Length: 1 hour, 15 minutes. Starts about 4 minutes in. 

Topics include:

Wildlife: including migrating birds and turtles.

Examples of bad lighting, some of which can be dangerous. Examples of good lighting.

More light not necessarily better. What can be done about light pollution. Measuring light pollution. Need minimum level of light, but better and less wasteful. Radio astronomy also has problems.

Need to spread the word - general public, schools.

"You can all do something to make a difference."



Video - Losing the Dark  - Flat Screen Version Losing the Dark - Flat Screen Version

Globe at Night - citizen science light pollution.: 

Loss of the night Android app to measure light pollution:

#lightpollution   #wildlife   #citizenscience   #lighting  
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In their circles
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"Tibetan Milky Way" by Jeff Dai
"On a dark starry night over the Tibetan plateau in western China, the bright central bulge of the Milky Way shines over a Tibetan house. This galactic nucleus at first was mistaken as light pollution by us."

Image Credit & Copyright: Photographer Jeff Dai
Caption Credit: Jeff Dai

#Space #Astronomy #Earth #MilkyWay #Stars #Tibet #China
#Himalayas #Photography #Art #Science #Cosmos #Universe
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20 minute video about light pollution  - and dark skies at Mt John University Observatory, South Island, New Zealand.

#lightpollution   #darkskyplaces   #health  
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Milky Way from dark skies

I'm hanging out at my Father's house on Hornby Island, BC. And the skies here are incredibly dark. Here are some of my pictures from last night.
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"A well lit street isn't necessarily safer." - Research by a 14 year old in Canada.

Video: 1m 57s.

#lighting   #crime  
Grant Mansiere says the data collected from the Penticton and Summerland RCMP showing high crime areas are well lit has convinced him to walk on the dark side of the street...
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Improved lighting at Arizona Stadium, University of Arizona, Tucson - before and after photos. 

Saves energy, increases light on pitch whilst reducing light spill.

#floodlights   #sports  
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"A garden inspired by Brecon Beacons National Park dark sky status has won a silver gilt medal at this year's Chelsea Flower Show."

#darkskyplaces   #gardens  
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In their circles
42 people
Have them in circles
1,678 people
Contact Information
Contact info
Restore our natural, starry skies by reducing inefficient lighting.
The Campaign for Dark Skies (CfDS) aims to preserve and restore the beauty of the night sky by campaigning against excessive, inefficient and irresponsible lighting that shines where it is not wanted nor needed.

It was founded in 1989 and is part of the British Astronomical Association (BAA) and affiliated with the International Dark-Sky Association (IDA).

The issues raised by light pollution do not only affect astronomers.  Other areas of concern include crime, the environment and health.

Glare and light spill can make it more difficult to see in the dark. Nocturnal wildlife, such as bats and moths, and plants, eg which use day length to monitor seasons, can be affected. So can migrating birds. Intrusive light can, for example, disrupt sleep.

Some of the pages on the Campaign for Dark Skies website:
Publications about light pollution:


Light Pollution: Responses and Remedies, 2nd Edition, Bob Mizon, Springer, was published on 24 June 2012. The first version of the book is still available: Light Pollution: Responses and RemediesBob Mizon, Springer, 2002. On 'Look Inside!' is enabled for both books. The previews include contents and index.

There Once Was a Sky Full of Stars, Bob Crelin and Amie Ziner, Sky Publishing Corporation, 2007.


Light Pollution and Astronomy, House of Commons Science and Technology Committee, 2003 [pdf]

Artificial Light in the Environment, The Royal Commission on Environmental Pollution, 2009. [pdf]

Guidance for the Reduction of Obtrusive Light, ILP, 2012. [pdf, automatic download]

A Review of the Impact of Artificial Light on Invertebrates, Charlotte Bruce-White and Matt Shardlow, Buglife, 2011. [pdf]