In a world increasingly illuminated by artificial light, the beautiful night skies of a small coastal town in South Australia have attracted international recognition. Carrickalinga on the Fleurieu Peninsula is Australia’s first official Dark Sky Community. The title rewards a dedicated community effort to combat light pollution and preserve the natural environment at night.
The journey began three years ago when I was a PhD candidate at the Australian National University, working on the value of night skies. I was a regular visitor to Carrickalinga, but this time conversations at a picnic one evening turned to the clarity and brilliance of the stars. I was inspired to work with the locals to nominate Carrickalinga as a “Dark Sky Place”.
My recent research suggests restoring dark skies would be worth US$3.4 trillion (A$5.16 trillion) to the world, annually. That’s largely because light pollution is disrupting nocturnal pollinators, altering predator-prey interactions, and changing the behaviours of nocturnal species.
Light pollution has detrimental effects on wildlife, human health, and ecosystem functions and services. But there are simple solutions. By embracing responsible lighting practices, everyone can contribute to a healthier future in which the wonders of the night sky are accessible to all.
Understanding light pollution
Light pollution refers to human alteration of outdoor light levels. Excessive or misdirected artificial light brightens the night sky, diminishing our ability to see stars.
Research shows the problem is getting worse. Light pollution increased by 7–10% a year from 2011 to 2022. More than a third of people on Earth cannot see the Milky Way.
Light pollution not only affects our view of the cosmos, but also wastes energy and money, contributes to climate change and has significant repercussions for both ecological and human health.
Nocturnal animals such as bats and certain birds rely on darkness to navigate and find food. Insects, crucial for pollination and as a food source for other wildlife, are also affected. Artificial light at night is contributing to their decline.
In humans, studies have shown artificial light interferes with circadian rhythms, leading to sleep disorders and other health issues.
The global Dark Sky movement
DarkSky International, formerly known as the International Dark Sky Association, is a global network of volunteers combating light pollution. The non-profit organisation established in 1988 is based in Tuscon, Arizona in the United States. But more than 193,000 people across more than 70 countries are involved, including astronomers, environmental scientists and the public.
The International Dark Sky Places Program was born in 2001 when Flagstaff, Arizona was named the first International Dark Sky City. Now the program certifies five types of Dark Sky Places: sanctuaries, reserves, parks, communities, and urban night sky.
DarkSky says the aim is to “preserve and protect the nighttime environment and our heritage of dark skies through environmentally responsible outdoor lighting”. It recognises places that demonstrate a commitment to reducing light pollution through public education, policy, and promoting responsible lighting practices.
There are now well over 200 Dark Sky Places across the globe. This covers more than 160,000 square kilometres in 22 countries on six continents.
Protecting the night with International Dark Sky Places since 2001.
Australia’s Dark Sky Places
Australia is home to several Dark Sky Places, each recognised for their exceptional night skies and dedication to reducing light pollution. These include:
Palm Beach earns global recognition for starry night skies | 9 News Australia.
Our journey in Carrickalinga
Since 2021, the Carrickalinga community has worked tirelessly towards achieving International Dark Sky Community certification. The journey involved several key initiatives:
Sky Quality Metering Program: regular measurements of sky brightness to monitor light pollution levels
Community engagement: presentations to community groups and the district council to raise awareness about light pollution, information stalls at local markets, community consultation process (led by the District Council of Yankalilla)
Educational materials: printed flyers, video, and a “Star Party” including a presentation on First Nations cosmology
Policy development: collaboration with the district council to create a lighting policy including public lighting design that complies with both Australian standards and DarkSky requirements.
Carrickalinga is currently upgrading existing public lighting to reduce light pollution. This will involve a new lighting design plan that reduces correlated colour temperature, ensuring shielded downward-facing lights minimise skyglow, glare and light trespass.
Reducing light pollution by upgrading lighting fixtures does not compromise safety. Dark sky does not mean dark ground.
Light pollution has become such a problem because our lights are unnecessarily bright and poorly designed. Fixing the problem simply involves changing the colour from white to amber, shielding and targeting lights so they do not shine upwards and outwards, and reducing wattage where it is surplus to requirements for people’s safety.
Carrickalinga became Australia’s first International Dark Sky Community in May, 2024. The Backyard Universe
How you can help
Achieving and maintaining dark sky status is not difficult but it does require ongoing community effort. Here are the five principles for responsible outdoor lighting, which apply equally to domestic as well as public lighting:
Useful – use light only if it is needed and has a clear purpose
Targeted – direct light so it falls only where it is needed
Low light levels – light should be no brighter than necessary
Controlled – use light only when it is needed
Warm colours – use warm coloured lights wherever possible and avoid short-wavelength (blue–violet) light.
An inspirational journey
Achieving International Dark Sky Community status was a significant achievement in preserving the natural night environment and educating the local community about light pollution. This accomplishment demonstrates the power of community action and serves as a model for others.
By protecting our night skies, we safeguard a vital part of our natural and cultural heritage and also promote healthier ecosystems and communities. Carrickalinga’s journey serves as an inspiring example of what can be achieved through collective effort and dedication to preserving our planet’s natural beauty.
I would like to acknowledge the enormous contribution of Carrickalinga Dark Sky Community volunteer Sheryn Pitman, who works for Green Adelaide in the South Australian Department for Environment and Water, and helped write this article.
It`s been 80 years since the horror of nuclear weapons was first unleashed with the US bombing of Nagasaki and Hiroshima. Find out how we can work together to stop this madness and grow a Movement for Peace at the Blue Mountains Peace Symposium on Saturday 2nd August. The day will include presentations by Robert Tickner AO, the Ambassador for the International Campaign to Abolish Nuclear Weapons (ICAN); Mayor Mark Greenhill on Mayors for Peace; Susan Templeman MP; Dr Siswo Pramano: Indonesian Ambassador; veterans of the Peace Movement and young activists; Rowe Morrow OAM from Quakers; Jennifer Scott AM from Rotary International; journalist Harumi Hayakawa; and Dharug man Chris Tobin. It will also include a film screening, and a Community Peace Picnic with food, exhibition, stalls, badge and origami crane making and live music with the Bearded Ladies Community Choir. The Symposium has been organised by the Blue Mountains Peace Collective and the Blue Mountains Planetary Health Initiative. Please share to help us grow a movement and book your tickets at the link below (link in profile):
The Bushcare Seed Collectors are meeting today from 10am to 3pm at the Planetary Health Centre. It`s a great way to learn more about propagating native plants. Watch our video below and read more in Katoomba Area Local News: https://www.katoombalocalnews.com/bushcare-seed-collectors/...
The Bushcare Seed Collectors are meeting today from 10am to 3pm at the Planetary Health Centre. It`s a great way to learn more about propagating native plants. Read more in Katoomba Area Local News: https://www.katoombalocalnews.com/bushcare-seed-collectors/ (link in profile)
We are holding School Holiday workshops for young people on Thursday 17 July. In these fun workshops with Sherlie Mcmillan (known for her Fashion Upcycling and Women`s Shed workshops) young people will be introduced to woodwork and textile crafts with a great teacher! Accompanying adults welcome.
Book for the Weaving and Embroidery Workshop for 6-8 yr olds here (link in profile): https://events.humanitix.com/weaving-and-embroidery-workshop-for-6-8yr-olds
Book for the Workshop for 8-12 yr olds to Create a Pom Pom Launcher, Pom Poms and Headband here (link in profile): https://events.humanitix.com/create-a-pom-pom-launcher-pom-poms-and-headband
Our new Planetary Health Newsletter includes the Blue Mountains Peace Symposium, School Holiday Workshops, today`s Planetary Health Bushcare, a story about a Men`s Group in Lawson, a workshop on Designing Your Future Home, and information on how to prepare for Bushfire Season with Council`s chipping service. You can read it here: https://bit.ly/3TkWGRj (link in profile) #planetaryhealth #peace #peacesymposium #bluemountains #schoolholidayworkshops #hope #solutions #mensgroup #katoomba...
The Community Tree Planting Day for the Glossy Black Cockatoo is on this Saturday 5 July near Cowra! Learn more about how you can help grow connected landscapes to save the Glossy Black, including more about the Community Tree Planting Day, by fast forwarding to 48mins in our video "Falling in Love with Glossy Black Cockatoos" here: https://www.youtube.com/watch?v=pCERdF21Ud0&t=2075s
Register your interest to join everyone at the Tree Planting Day here:
Join us for this fabulous workshop: Designing Your Future Home on Saturday 19 July (10am-12 noon) Create a Healthy, Comfortable and Energy-Efficient Home
Join local Passive House Designer Karina Rafailov from Earthy Haus for a relaxed, interactive, and inspiring workshop. Whether you’re planning a new build or thinking about a renovation, this session will empower you with the knowledge to create a home that’s healthier for your family and kinder to the planet.
Places are strictly limited in this hands-on workshop so bookings essential here (link in profile): https://www.eventbrite.com.au/e/workshop-designing-your-future-home-tickets-1417752157869
As an increasing number of people are being affected by winter viruses, we’re offering a free session of Tai Chi and Qigong on Saturday 5 July in the warmth of our beautiful Frogs of the Blue Mountains exhibition. Places are limited so book in early here (link in profile): https://bit.ly/40fnGW2 Learn more about these Chinese medicine movement practices in the video interview with Virginia Field on our YouTube channel (link in profile) and read about how Chinese medicine helped her overcome illness as a young woman in our story: Healing Body, Mind and Spirit with Tai Chi and Qigong here (link in profile): https://www.katoombalocalnews.com/tai-chi-and-qigong/
If you’re interested in learning how to propagate native plants and are keen to help our bush regenerate, the Bushcare Seed Collectors meet on the second Tuesday of the month. Check out how they cook Banksias to release their seed and learn more about the group, and native seed collecting, in Katoomba Area Local News here (link in profile): https://www.katoombalocalnews.com/bushcare-seed-collectors/
If you’d like to join the group, contact the Bushcare officer Tracy Abbas on 4780 5623 or email tabbas@bmcc.nsw.gov.au
Littlejohni, the Rare and Endangered Northern Heath Frog, photographed in Woodford!
When the Frogs of the Blue Mountains exhibition opened at the Planetary Health Centre in March it featured photos of 20 different local frogs. We were thrilled, however, when Andy Klotz and other members of the Hawkesbury Herpetological Society recently managed to photograph another frog in Woodford: the rarely seen and endangered Litoria littlejohni, also known as the Northern Heath Frog or Orange-bellied Tree Frog. We’ve added a photo of that frog to the exhibition and created a new Frogs of the Blue Mountains video in which you can listen to its call on our YouTube channel. We interviewed Andy to learn more about the Littlejohni and how they managed to find its small local population. You can read this story in Mid Mountains Local News (link in profile). #biodiversity #bluemountainsfrogs #northernheathfrog #litorialittlejohni #bluemountains #woodford #planetaryhealth #hawkesburyherpetologicalsociety...
Our newsletter is now out! Read about how you can contribute to @bluemountainscitycouncil`s Biodiversity Conservation Strategy; watch our video on Falling in Love with Glossy Black Cockatoos; see the new photos of the rare Northern Heath Frog; watch how the Bushcare Seed Collectors cook banksias to release their seeds; learn more about Tai Chi and Qigong, the Chinese medicine movement practices; and take part in our next workshop on Designing Your Future Home with Passive House Designer Karina Rafailov from @earthy_haus
Read it here (link in profile): https://bit.ly/40e4GHr
Our video on Falling In Love With Glossy Black Cockatoos is now up on our Planetary Health YouTube channel (sorry, it`s too big to share here but there`s a link in our profile).
Jayden Gunn finishes his presentation by saying:
"Care is like a snowball. The more people you tell the bigger the snowball gets, and the further it goes. And the more we know, the more we care. And the more we know, the more we`re able to help."
The video is of our fabulous Forum on Growing Connected Landscapes for the Glossy Black Cockatoo, and includes presentations by Jayden Gunn, BirdLife Australia, Amanda Foxon-Hill from Mid Lachlan Landcare, and STEM teacher Samantha Bowden from Glenbrook Public School. There`s a link with the video on how to register for the Community Tree Planting Day in Goologong on 5 July (and it`s also in our profile). Video here: https://www.youtube.com/watch?v=pCERdF21Ud0&t=13s
Andy Klotz and other members of the Hawkesbury Herpetological Society recently managed to photograph the rarely seen and endangered Litoria littlejohni, also known as the Northern Heath Frog or Orange-bellied Tree Frog. We interviewed Andy to learn more about the Littlejohni and how they managed to find its small local population in Woodford.
