River Murray International Dark Sky Reserve

17/09/2026

🌓 CELEBRATE INTERNATIONAL OBSERVE THE MOON NIGHT! 🖤

This Saturday marks NASA's International Observe the Moon Night, and the sky is putting on a spectacular show! A bright 55% illuminated First Quarter moon will take center stage in the evening sky, offering the perfect opportunity to grab a pair of binoculars or a telescope and explore the crisp craters along the lunar shadow line.

Your weekend stargazing guide for the River Murray International Dark Sky Reserve (RMIDSR), spotlighting the beautiful riverside township of Wongulla.

WONGULLA | 19 September 2026
Sunrise: 06:06 | Sunset: 18:05
Moonrise: 10:45 | Moonset: 01:18 (Sun AM)
Astronomical Twilight Ends: 19:29
Moon Phase: First Quarter 🌓 (~55% illumination)
Wongulla, SA | 34.69° S, 139.54° E

📸 [WEEKEND SNAPSHOT]

🪐 [Planetary Highlights]: Look West as twilight sets in! Venus continues its brilliant run as the iconic Evening Star, blazing in the western sky until it sets at 9:56 PM. Over in the East, Saturn is perfectly positioned for prime viewing, rising early at 7:12 PM to join the moon for an incredible planetary display.

[The Moonlit Crater Tour (7:29 PM – 1:18 AM)]: Because the First Quarter moon is high in the sky as astronomical twilight ends at 7:29 PM, it provides ideal cross-lighting to view dramatic lunar mountains and craters. The moon will dominate the first half of the night before setting at 1:18 AM, leaving a late-night ink-black window for deep-space viewing.

🖤

📷 | RMIDSR

17/09/2026

Astronomers have confirmed a world that’s less than a million years old as the youngest known planet, using data from NASA-funded archives.

Called Elias 2-24 b, the baby planet is still whirling in its natal disk of dust and gas.

Astronomers have confirmed a world that’s less than a million years old as the youngest known planet, using data from NASA-funded archives. Called Elias 2-24

16/09/2026

What are phytochromes and why do they matter?

If Photoperiodism is the clock, Phytochromes are the sensors.

Continuing our theme of ALAN on Flora, today we look at the "eyes" of our native plants. Phytochromes are light-sensitive proteins within plant leaves that act like a biological switch, telling the plant whether it is in the light, the shade, or—most importantly—the dark.

🌑 The Red-Light Switch: Phytochromes are specifically tuned to red and far-red light (the colours of sunset). When the sun goes down, these proteins change shape, signaling the plant to begin its "night shift" functions like repair and growth.

🌑 The ALAN Interference: Most streetlights and security lights emit wavelengths that mimic the sun. This keeps the Phytochromes in "day mode." Even a small amount of light at the wrong time prevents the "switch" from flipping, meaning the plant never truly knows it’s night. Modern LED streetlights are high in blue light, which is even more disruptive to these sensors than older, warmer lights.

🌑 Why it Matters: For Mid Murray icons like the Silver Daisy-bush, this means the plant may fail to "see" the changing seasons. It’s like trying to sleep with the bedroom light on—you might doze off, but your body never gets the deep, restorative rest it needs to stay healthy. By keeping our skies dark, we allow the Mallee’s "eyes" to see the natural rhythm of the stars.

15/09/2026

🚀 EVERY MISSION NEEDS A CREW 🌌

Meet the people bringing Skycare Station 01 to life in Sedan.

From left: Ken, David, Helen, Andrew and Richard.

Ken, David and Andrew are our Dark Sky tech gurus, bringing a world of knowledge and experience to the project. Helen and Richard are hosting the first station in the RMIDSR Sky Quality Network. Their property will host an automated station measuring night-sky brightness, powered by solar energy and connected via 4G to the upcoming public Skycare Live dashboard.

The mission is bigger than one station: to build a reliable picture of night-sky conditions across the 3,200 km² River Murray International Dark Sky Reserve and lay the foundations for a wider community-led monitoring network.

Behind the scenes, Kate is bringing the people, planning and project pieces together, while Skye is supporting the cloud computing and software systems that will help turn station data into accessible public information.

🌌 Landholders opening their property to science
☀️ Solar-powered monitoring
📡 Data sent via 4G
🤝 Community collaboration

This is Skycare in action: people working together to understand and protect the dark.

📝 OWN LAND WITHIN THE RESERVE?

Register your land for consideration as a future Skycare host site:
https://events.humanitix.com/rmidsr-project-night-watch

Follow Project Nightwatch as Station 01 comes online.

10/09/2026

✨ PRISTINE INK-BLACK SKIES ARE BACK! ✨

If you have been waiting for the ultimate stargazing window, this is your weekend! With the New Moon fresh behind us, the night sky is completely open, clear, and perfectly dark. Pack your blankets, grab a warm drink, and head out to see the cosmos shine in its purest form.

Your weekend stargazing guide for the River Murray International Dark Sky Reserve (RMIDSR), spotlighting the riverside township of Walker Flat.

WALKER FLAT | 12 September 2026
Sunrise: 06:16 | Sunset: 18:00
Moonrise: 06:34 | Moonset: 19:14
Astronomical Twilight Ends: 19:24
Moon Phase: Waxing Crescent 🌒 (~2% illumination)
Walker Flat, SA | 34.75° S, 139.56° E

✨ [WEEKEND SNAPSHOT]

🪐 [Planetary Highlights]: Look West immediately after sunset! Venus continues to blaze brilliantly as the iconic Evening Star, remaining visible until it sets at 9:44 PM. Later, look toward the East to find Saturn rising at 7:42 PM with excellent stability for binoculars or telescopes.

[The Dark Sky Window (7:24 PM Onwards)]: Pure darkness! Because the ultra-slim 1.3% crescent moon slips below the horizon early at 7:14 PM, it vanishes just before astronomical twilight fully wraps up at 7:24 PM. From that exact moment on, the sky is a 100% dark canvas, making it ideal for tracking the deep Milky Way core and faint constellations without a single drop of lunar interference.

🖤

📷 | RMIDSR

09/09/2026

The Tree’s Internal Clock — Understanding Photoperiodism

For our native Mallee flora, darkness is more than a rest period—it is a vital seasonal cue.

This month, we are exploring ALAN on Flora. Our first focus is Photoperiodism—the biological function that allows plants to "measure" the night to time their life cycles. While many introduced species use this to drop leaves, our Australian natives use it to survive the extremes of the Mid Murray.

🌑 The Signal: Native species like the River Red Gum use long nights as a signal to enter dormancy or trigger flowering.

🌑 The ALAN Impact: Artificial light at night (ALAN) creates a "perpetual spring." This tricks the plant into wasted energy production during periods of heat or drought when it should be conserving resources.

🌑 The Wildlife Risk: When plants flower out of sync due to light pollution, it creates a "resource gap" for our nocturnal pollinators—like the Western Pygmy Possum and native moths—who rely on these reliable seasonal food hits to survive.

To care for the Land, we must protect the biological rhythm of the Sky.

07/09/2026

📡 PROJECT NIGHTWATCH: BEHIND THE DATA 🌌☀️

What does a remote sky-quality station actually do?

As we prepare for our very first Project Nightwatch pathfinder station installation this September, we’re taking you behind the scenes of the technology helping us monitor and protect the night skies across the River Murray International Dark Sky Reserve.

Project Nightwatch is building a community-led network of automated, solar-powered, standalone sky-quality sensors across the Reserve. The stations will measure real-time night-sky brightness from local paddocks and send the data to our upcoming public Skycare Live Dashboard, where people will be able to access, track and learn from it.

Here’s what’s been happening behind the scenes:

📍 SITE VISITS & LOCAL PRIDE
Our tech team has been testing network signals across shortlisted properties to identify the most stable upload pipelines. Meeting landholders and seeing their pride in our region’s wildlife, habitat and dark skies has been a highlight of the project.

🖤 COMMUNITY CONNECTIONS
We’re joining forces with the skilled team at the Swan Reach Men’s Shed, who are custom-fabricating the heavy-duty steel solar mounting frames for the stations. Their ideas and experience are helping shape the project.

👁️ THE SCIENCE CORE
The Unihedron SQM-LE, our high-precision night-sky brightness photometer, is secured and ready for the project. It measures real-time night-sky brightness.

📡 THE GATEWAY
The Teltonika RUT906 is an industrial-grade 4G router that will handle the station’s connection to the cloud database, helping us keep the project’s night-sky data flowing.

We’re getting close to installation and going live. Follow along for more Project Nightwatch updates in September as we celebrate spring, our local landholders and the community working to protect our dark skies.

📝 LANDHOLDERS: EXPRESSIONS OF INTEREST ARE OPEN
Own land within the Reserve? Register your paddock for consideration in our future data-network expansion by completing the site-suitability form:

🎟️ APPLY HERE: https://events.humanitix.com/rmidsr-project-night-watch

🖤 Inspiring South Australia

02/09/2026

WATCH: September Milky Way Guide — Do Not Miss These Dates! 🌌✨

If you are planning some night sky photography or backyard stargazing this September, don’t just head out on the first clear night. This month can easily fool you!

For our mid-week learning feature, we are showcasing the premium new video guide by our fantastic regional partner, volunteer, and citizen science educator, Matt Clarke from Odyssey! 🤝🖤

Matt’s September Field Guide Overview:

🔱 Best Dark-Sky Window: September 7–13.
🏆 Matt's Favourite Nights: September 9–13 (offering the absolute darkest skies and strongest Milky Way contrast).
🌑 New Moon Phase: Arriving around September 11–12.
⚠️ Season Warning: The Galactic Core is sliding west fast! Your evening windows are significantly shorter than they were in August.

September is one of your very last premium chances this season to photograph or view the Galactic Core before it drops away. Learning how to master these short dark-sky windows highlights exactly why our daily protection mission matters so much.

👇 Watch Matt’s full breakdown via the link in our bio or the first comment below!



📷 Matt Clarke | RMIDSR

02/09/2026

New month, new milestone. 📡🌌

We are pulling back the curtain on PROJECT NIGHTWATCH all September long.

This month, our technical team is preparing to deploy the very first automated sky sensors across the region. Follow along to see how local landholders, tech innovators, and community legends are building Australia's premier real-time dark sky monitoring network.

Project NightWatch is a citizen science initiative of Mid Murray Landcare SA Inc. working closely with the Mid Murray Council and the Murraylands community, proudly funded by Inspiring South Australia.



📷 David Hartley | RMIDSR