A system called V404 Cygni was thought to be a black hole and a companion star, but another star billions of kilometres away was also found gravitationally connected to the duo.
Think you're pretty night-sky-smart? Take our stellar quiz to find out
Sink into your chair and prepare your brain for a battle with knowledge. With questions ranging from the Moon to Sirius and celestial gems outside our galaxy, this quiz will stretch the boundaries of your mind.
Topic:Explainer
Photo shows Star trails over land and water'Dark skies have always been home': How light pollution affects my connection to First Nations culture
The dark night sky has special meaning for Krystal De Napoli, an astrophysicist and Gomeroi woman, but light pollution is erasing constellations from view that have guided her peoples' connection with Country since time immemorial, she writes.
Topic:Perspective
Photo shows Krystal sits perched alongside a large telescope with a sunset sky behind her.This photo of the Milky Way was shot with a phone — and you can do it too
Smartphones are now advanced enough to take photos that were once only possible using bulky cameras. Here's our guide to snapping a stunning shot of the Milky Way.
Topic:Explainer
Photo shows The Milky Way galaxy in the night sky above a lit-up rock.What's the most amazing thing you've seen in the night sky?
It's Science Week, which means it's time to ask Australia an important question: What's filled you with awe in the night sky? Auroras, lightning sprites, the Milky Way, meteor showers … start voting now!
Photo shows Saturn appears in the black sky. It appears brown in colour and its rings appear grey.Australia gets a front-row seat to some of the best night skies in the world in winter
It might be chilly, but Australia's night sky puts on a dazzling show at this time of year. Rug up and use our guide to see if you can spot some of our winter wonders.
Topic:Explainer
Photo shows A photographer looks up while holding a lighting device at the Milky Way surrounded by leafless treesCan you see the Milky Way where you live?
Many people can no longer see the Milky Way because light pollution overwhelms the stars. Researchers are keen to know more about how Australians experience this phenomenon.
Photo shows A woman is looking into a large telescope with the star-filled night sky as backdrop.Rotten eggs smell discovered on already inhospitable planet
The James Webb Space Telescope has revealed trace elements of hydrogen sulphide — the chemical compound behind the stench of rotten eggs — on a planet 64 light-years away.
Photo shows A swirly blue-green planet sitting in space partially illuminatedIf predictions are right, we could see an exploding star on the horizon soon
A spectacular nova may be about to light up our night sky in the constellation Corona Borealis. If it does, Australians will only have a short window to catch it.
Photo shows A star which looks like a firework.Fitting farewell to 'Space Gandalf' who brought astronomy to the people
Broome locals and visitors paid tribute to astronomer and tour guide Greg Quicke, affectionately known as "Space Gandalf", performing a "paddle out" at Cable Beach after his passing in June.
Photo shows A composite picture of a bearded man and surfers at a beachThe Sydney stargazing spot globally recognised for its dark night skies
Just 30 kilometres north of a bustling CBD but surrounded by national parks, Palm Beach headland has been given the nod by the DarkSky International organisation.
Photo shows a galaxy above a dark strip of land over the seaSunshine Coast hinterland's bid to attract stargazers by becoming Dark Sky Reserve
Renowned for its multi-million-dollar wedding industry, Queensland's Sunshine Coast hinterland hopes to add stargazing to its tourism drawcard.
Photo shows A container shed sits in the forground of the photo with a sign, 'Maleny Golf Club' as the Milky Way shines overhead.Much-loved outback astronomer Greg 'Space Gandalf' Quicke dead at 62
A legend in the Kimberley with his distinctive white beard — Greg Quicke introduced generations of visitors and locals to the wonders of the universe through his "astro tours" in the town of Broome
Photo shows A man with a beard and headset mic smilesWhat are geomagnetic storms and why do they produce such stunning light displays?
The Earth has experienced its strongest geomagnetic storm of the past 20 years, resulting in stunning light displays across the globe. But what are geomagnetic storms exactly and do they present a risk to people or the planet?
Topic:Explainer
Photo shows Sky at night lit up in pink hues with trees and a road below.Video of the Sun's surface shows its 'ever-changing' landscape
The video also showed spires of gas on the Sun's solar horizon, which can reach to a height of 10,000 kilometres.
Photo shows A golden hair-like structure.Astronomers detect Milky Way black hole with mass 33 times that of the Sun
Astronomers have discovered the second-largest black hole known to be in the Milky Way, and it's located just 2,000 light-years from Earth.
Photo shows A size comparison of three black holes next to each other.Millions take in total solar eclipse across North America
A total solar eclipse sees millions of people across North America watch as the Moon completely blocks the Sun, for more than four minutes in some places.
Photo shows A man wearing special glasses over his eyes.Canada's Niagara region has declared a state of emergency ahead of the total solar eclipse. Here's why
The Sun is about to pull a disappearing act across North America, turning day into night during a total solar eclipse. Here's how Aussies can join in on the action from home.
Topic:Explainer
Photo shows A photograph of a total solar eclipse - the moon is skirted by a ring of bright light, that of the SunPlumber's obsession with would-be exploding stars is helping astronomers 'find the unknown'
From the observatory he built in his backyard, Rod Stubbings is one of only three people worldwide who have made 400,000 measurements of the brightness of variable stars.
Photo shows a man wearing a blue shirt smilesNASA's Hubble telescope delivers spectacular images of galaxies
From colourful smidges to striking streaks and captivating swirls, the latest gallery of interstellar snapshots has it all.
Photo shows A dispersion of dust in hues of blueRecord-breaking rainfall in outback NSW creates 'sparkling' conditions for stargazing
Broken Hill's wettest January day on record leaves a clear view of the cosmos in its wake, exciting tourists and locals keen to catch a glimpse.
Photo shows A collection of stars surrounded by a nebula