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.
Looking for a fun, educational and sustainable day out these school holidays?
Come along to Plate to Planet: Blue Mountains Food Security Fair in Katoomba on Saturday 10 October, with a line-up of free talks, activities and entertainment for all ages!
🌿 The Importance of Bioregions in Uncertain Times Join permaculture pioneer Rowe Morrow to explore how our land, water, food, energy and communities are connected - and how we can build a more resilient Blue Mountains.
🌱 Discover Old Man Saltbush Get up close to this remarkable native plant with Anne Elliot, and discover its potential as part of a more diverse and resilient food system.
🪱 Have a go at worm farming Learn how easy it can be to turn food scraps into valuable nutrients for your garden - with a hands-on worm farm activity from BMCC.
🎶 Enjoy live music Take a break, relax and soak up the atmosphere while enjoying live music by Olivia Dustmann throughout the day.
🎨 Kids` Corner - all day! Rock painting, crafts and story time, with plenty of fruit and veggie-inspired fun for younger visitors.
Explore local stalls, food, gardens, wildlife, sustainability and practical ideas for creating a more resilient food future.
Entry to the Fair and markets is free, with a range of free and paid sessions and workshops available throughout the day. Some sessions have limited capacity, so registration is recommended.
View the full program and register your place here: https://events.humanitix.com/blue-mountains-2026-food-security-fair
📅 Saturday 10 October | 9am–4pm 📍 Blue Mountains Planetary Health Centre, Katoomba...
Join Andris Heks, Yogic Psychotherapist, winner Best Actor, Blue Mountains, for his workshop to laugh as you never laughed before, as part of a movement to globalise people-bonding cheerfulness through kookaburra laughter contagion as an antidote to distressing world divisiveness.
Purchase your ticket here: https://events.humanitix.com/kookaburra-laughter-workshop
View the trailer and the GoFundMe page here: https://www.gofundme.com/f/globalise-unconditional-love-through-kookaburra-laughter
Key event information: - When? 10:15AM - 2:30PM, Sunday 4 October 2026 (1st day of Daylight Saving - 1 hour forward) - Where? Blue Mountains Planetary Health Centre, 33-39 Acacia St, Katoomba, NSW, 2780 - Fee? $60 or what you can afford - Note: please bring your own lunch
What to expect: - Learn how to stay cheerful for good - Learning the funny, human emulated, communal kookaburra laughter and meditation - How communal kookaburra laughter promotes bonding even amongst strangers - The awesome native treasure of the laughing kookaburra phenomenon - Why Kookaburra Yoga is the ‘most excellent of Yogas` - How communal kookaburra laughter contagion boosts the subtle and gross national product - How you could contribute to the kookaburra laughter contagion
This event is supported by Blue Mountains Planetary Health.
Purchase your ticket here: https://events.humanitix.com/kookaburra-laughter-workshop...
Come along to the Planetary Health Centre this Saturday for the next Skill Share Saturdays event!
This weekend`s agenda:
8:30AM - 10AM | Learn how to use your sewing machine class with Sherlie McMillan
8:30AM | Planetary Health Cafe open, serving Good Fat Pastry and Whisk and Pin
9AM - 10AM | Tai Chi and Qigong class with Virginia Field
10AM - 12PM | Learn how to grow WITH the Upper Blue Mountain permaculture workshop with Leni from Alchemy Farms
10AM - 3PM | Fashion Upcycling Workshop with Sherlie McMillan
10:30AM - 12PM | Learn to make focaccia from scratch with Laura Zucchetti (no experience needed)
1:30PM - 4:30PM | Planetary Health Bushcare with Karen Hising
For more information and to purchase a ticket, please visit the website: https://events.humanitix.com/skill-share-saturdays-at-the-planetary-health-centre...
Plate to Planet: Blue Mountains Food Security Fair 2026
📣HEADLINE SPEAKER📣
Our headline speaker is Julian Cribb AM – a renowned Australian science writer, journalist and author who has spent more than 50 years communicating science, agriculture, climate and global sustainability issues. He is the author of several influential books, including The Coming Famine (2010), Food or War (2019) and How to Fix a Broken Planet (2023), which explore the future of food systems, planetary health and humanity`s long-term survival.
He is widely recognised as one of Australia`s leading voices on global food security and sustainable development.
To register for his talk, and view the rest of the program, visit the website: https://events.humanitix.com/blue-mountains-2026-food-security-fair...
At our next Skill Share Saturdays event on Saturday 5th September, join Laura Zucchetti at 10:30am to learn how to make focaccia from scratch!
Come along for a 90 min class where you`ll mix, rest and stretch your own focaccia dough from start to finish, guided every step of the way. You’ll take home your dough to bake on the day in your own oven.
Sign up to this session, and view the other offerings on the day via this link: https://events.humanitix.com/skill-share-saturdays-at-the-planetary-health-centre...
Plate to Planet: Blue Mountains Food Security Fair 2026
We are pleased to announce that the program and registration for Plate to Planet: Blue Mountains Food Security Fair 2026 is now live!
Follow this link to view the program and register your place: https://events.humanitix.com/blue-mountains-2026-food-security-fair
Key information:
When? Saturday 10 October, 9AM - 4PM
Where? Blue Mountains Planetary Health Centre, Katoomba
Who is it for? Families, gardeners, enthusiasts, community groups and businesses, anyone looking to learn about how to be more resilient through local and sustainable food systems.
What to expect? Talks, workshops, demos, market stalls, family activities, music, food
Is there a cost? Entry to the Fair and Markets is free. Talks and workshops are ticketed (both free and paid) and have limited capacity, so please register in advance.
Program highlights:
🌏Headline talk: The age of renewable Food – Julian Cribb AM 🎋Wild edibles foraging workshops – Diego Bonetto, Eat More Weeds 🏞️The importance of bioregions in uncertain times – Rowe Morrow, Permaculture Matters 🥒Home canning and food preservation workshop – Kirsty Berté, Permaculture Hawkesbury Valley 🏡Designing your own Permaculture Property – Leni Nyssen, Alchemy Farms 🍃Utilising what’s in front of you – Uncle Lex, The Ganya Shed 🪱How to worm farm - BMCC 🎸Live music by Olivia Dustmann 🌾Community crop and seed swap
Tickets are limited so please register your place now: https://events.humanitix.com/blue-mountains-2026-food-security-fair
We are also seeking stallholders for the event. If you are a grower, retailer, community organisation or business that would like to get involved, please reach out to [email protected]!...
Thank you to everyone that joined us at the Planetary Health Centre on Saturday for the first of our Skill Share Saturdays program!
The Centre was a hive of activity all day, and we heard from @alchemyfarms_permaculture, the @ediblegardentrailbluemountains team and Andy Mann. Also thanks to Sherlie McMillan from Greater Blue Mountains Rotary for teaching the Fashion Upcycling workshop, and Virginia Field for the Tai Chi and Qigong class.
The next event will be held on Saturday 1st August - you can register your place here: https://events.humanitix.com/skill-share-saturdays-at-the-planetary-health-centre
🖐Get involved!
Do you have a skill, program or interest that promotes planetary health that you`d be willing to share with members of the local community? We are looking for more workshop and session hosts for our future events.
Join us at the Planetary Health Centre in Katoomba on the first Saturday of every month for Skill Share Saturdays!
Our July program includes: - What to grow in a Blue Mountains climate - Eating for Earth - Tai Chi and Qigong - Fashion upcycling and clothing reuse workshop - How to get involved with the Edible Garden Trail
You are also welcome to bring any surplus seeds or produce for our Crop Swap, or wind down in the Planetary Health Cafe (until 2pm).
If you have a skill that you want to share, or any questions or queries, please contact [email protected]
Visit the website to view the full program of events and register your place.
Join Andy Mann, a 23 year old Lawson local, for their Eating for Earth session 🌏
Eating for Earth is a judgement-free plant-based educational workshop that all types of eaters are encouraged to attend. There will be a presentation about the environmental impact of diets, a discussion section, and best of all, food! The food will be fully plant-based.
Andy wants to help inform our passionate community about how we can better reduce dietary environmental impact.
The session will run from 11AM - 12PM on Saturday 4th July.
Other sessions include: - What to grow in a Blue Mountains Climate - Fashion Upcycling - Tai Chi and Qigong - Bushcare on the Planetary Health site - How to get involved with the Edible Garden Trail
To register your place, visit our website: https://events.humanitix.com/skill-share-saturdays-at-the-planetary-health-centre...
We’re excited to announce the second Blue Mountains Food Security Fair, taking place in Katoomba in October 2026.
This annual event will bring together growers, thinkers, makers, and community members to explore one of the most important challenges of our time: how we grow, share, and sustain food in a changing world.
Across the weekend, we’ll be exploring themes including: - Healthy soil and regenerative systems - Food and human health - Plant-based food futures - Home and community food resilience - Water-sensitive and climate-adapted growing - Indigenous food knowledge and systems - School food systems - Australia’s food procurement - Global food security challenges Expect a dynamic program of inspiring speakers, practical workshops, and hands-on experiences designed to leave you informed, empowered, and connected.
Key information Date: Weekend of 10th October 2026 Location: Blue Mountains Planetary Health Centre, Katoomba, NSW We’ll be announcing speakers and program details soon.
We are also inviting expressions of interest from individuals and organisations who would like to contribute to the program, host workshops, run a stall or partner with us.
Do you struggle making the most of your veggie garden all year round?
Join Leni from @alchemyfarms_permaculture on Saturday 4th July for her Permaculture Workshop: Learn how to grow WITH the Upper Blue Mountains seasons, rather than battling against them.
During the two-hour session, you`ll cover crop selection for different seasons, what to grow from seeds vs seedlings, frost and wind protection, and nurturing your soil with a seasonal cycle.
Register for this and other sessions as part of our Skill Share Saturdays program via this link: https://events.humanitix.com/skill-share-saturdays-at-the-planetary-health-centre...
In Katoomba, a grassroots litter-picking group tackles rubbish before it reaches our water supply. Their story shows how local environmental action, fueled by community connection, can drive meaningful change for planetary health.
