Map of all matter – most of which is invisible dark matter – between Earth and the edge of the observable universe.
Cosmologists are heading back to their chalkboards as the experiments designed to figure out what this unknown 84 percent of our universe actually is come up empty.
Supercomputer simulation of a pair of neutron stars colliding.
NASA/AEI/ZIB/M. Koppitz and L. Rezzolla
A LIGO team member describes how the detection of a gravitational wave from a new source – merging neutron stars – vaults astronomy into a new era of 'multi-messenger' observations.
Artist’s impression of the collision of two neutron stars, the source of the latest gravitational waves detected.
National Science Foundation/LIGO/Sonoma State University/A. Simonnet
Astronomers have finally confirmed the source of the latest detected gravitational waves was the collission of a pair of neutron stars, what they'd been searching for all along.
The Australia Telescope Compact Array in Narrabri, NSW.
All it took was a single email alert to send the world's astronomers searching for the source of the latest gravitational wave detected.
The Zadko telescope was set to study the optical glow following a gamma ray burst.
Efforts to see the afterglow from a neutron star merger were nearly thwarted by bad weather and a cyber attack on an Australian telescope.
Simulation of two neutron stars merging.
NASA/AEI/ZIB/M. Koppitz and L. Rezzolla
The gravitational wave itself is the least exciting part of the announcement from LIGO and Virgo. Observing this new source answers many longstanding questions.
The mass of the Earth is big enough that the gravitational force it creates can pull the hard shape of ice, rock and metal into a sphere.
NASA Earth Observatory images by Joshua Stevens, using Suomi NPP VIIRS data from Miguel Román, NASA's Goddard Space Flight Center
Imagine the Earth pulling everything it is made up of, all of its mass, towards its centre. This happens evenly all over the Earth, causing it to take on a round shape.
The Sun is currently middle-aged, having celebrated its 4,568,000,000th birthday at some point in the last million years.
In five or seven billion years time, the Sun's life will come to an end. And it will be really spectacular - if you're watching from far enough away.
Studying mysterious neutron stars could uncover the secrets of exotic physics – and a way to navigate the stars.
Artist’s conception of two merging black holes, spinning in a nonaligned fashion.
LIGO/Caltech/MIT/Sonoma State (Aurore Simonnet)
These ripples in the very fabric of the universe were hypothesized by Einstein a century ago. Now scientists have detected them for the third time in a year and a half – ushering in a new era in astrophysics.
andrey_l / Shutterstock.com
Simon John James and Richard Bower chat about differing conceptions of what it is to travel through time.
Have we really discovered other “Earth-like” planets orbiting around other stars? Understanding what we do and do not know about exoplanets is the key to answering this question.
ESO/L. Calcada/N. Risinger/Reuters
Over the last 20 years, advances in the field of exoplanet discovery have excited the imaginations of scientists and enthusiasts alike. But we're in position to know yet whether a planet is habitable.
Very few African universities offer postgraduate degrees in astronomy. This gap in knowledge and training can be addressed through international partnerships and collaboration.
Gravitational waves are produced by some of the most extreme events in the universe.
The OzGRav Centre of Excellence for Gravitational Wave Discovery will enable Australian researchers to be at the forefront of gravitational wave astronomy.
Specialized chamber to study dusty plasma in the lab.
The vast majority of matter in the universe is plasma: electrically charged gas. Scientists are untangling how dust interacts with plasma both in space and experimentally closer to home.
We can all reach for the stars in The Milky Way over Western Australia.
The drive the get more women involved in science should start at an early age. But as one space researcher found out, girls can get nudged out of science at school.
There are two broad ways to measure the expansion of the universe. One is based on the cosmic microwave background, shown here, along with our own galaxy viewed in microwave wavelengths.
ESA, HFI & LFI consortia (2010)
The universe is expanding faster than expected, but we don't know what's driving it. Here are a few of the possible explanations, from dark energy to a modification of general relativity.
A podcast on time: telling it, perceiving it, doing it and travelling through it.
You can learn a lot about the cosmos in the kitchen.
From supernovae explosions to the expansion of the universe and why the sky is blue: you can learn a lot about the universe in the kitchen.
A burst of ghostly neutrinos may have been generated by a quasar like this.
A burst of neutrinos detected deep under the Antarctic ice may have originated from a distant quasar on the edge of the visible universe.