More gravitational waves detected than ever before

Somewhere out there in the universe, neutron stars and black holes regularly collide, causing cosmic ripples in space and time – gravitational waves – to bounce their way across the cosmos to Earth. Now, an international team of researchers, including those from the ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav), have collaborated to … Continue reading More gravitational waves detected than ever before

When gravitational waves and dark matter collide

It’s hard to resist any physics story that starts with Albert Einstein. More than a century ago – in 1916, to be precise – the great theorist suggested that gravitational waves could be a natural outcome of his general theory of relativity. He was right: gravitational waves are ripples in the fabric of spacetime itself. … Continue reading When gravitational waves and dark matter collide

Gravitational waves from black holes swallowing neutron stars

Earlier this week, scientists announced an exciting discovery made with made with gravitational waves: the first confirmed detection of black holes swallowing neutron stars. Published in The Astrophysical Journal Letters, the study required input from scientists around the world, including Australians based at the ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav). Cosmos spoke … Continue reading Gravitational waves from black holes swallowing neutron stars

Black hole gulps down neutron star

For the first time, scientists have detected gravitational waves from a black hole swallowing a neutron star – and not just once, but twice. The detections were made by the Laser Interferometer Gravitational-Wave Observatory (LIGO) in the US and the Virgo gravitational-wave observatory in Italy, which first captured ripples in space-time reverberating out from a … Continue reading Black hole gulps down neutron star

What are continuous gravitational waves?

It’s been five years since the groundbreaking detection of gravitational waves, and researchers are probing ever-deeper into these ripples in the fabric space-time. But instead of searching for waves caused by the clash of cosmic titans, like two black holes or neutron stars, recent studies are focused on finding a softer signal – the “hum” … Continue reading What are continuous gravitational waves?

Milliseconds measure galactic gravity

Scientists measuring tiny changes in the arrival times of signals from millisecond pulsars have found a new way to measure both gravitational waves and the galaxy’s distribution of dark matter. Pulsars are rapidly rotating neutron stars that, like cosmic lighthouses, beam out radio signals that sweep the heavens – beams that can be detected by … Continue reading Milliseconds measure galactic gravity