The region around the supermassive black hole at the centre of the Milky Way, imaged with South Africa’s MeerKAT telescope.
South African Radio Astronomy Observatory (SARAO)
A black hole is an object with such a strong gravitational pull that nothing, not even light, can escape from it.
Ripples in space-time caused by massive events such this artist rendition of a pair of merging neutron stars.
Carl Knox, OzGrav
More ripples in space-time have been detected from merging pairs of black holes, one of which was the most massive and distant gravitational-wave source ever observed.
Artist impression of Abell 2597.
NRAO AUI NSF D Berry
Astronomers have suspected them for ages –now a team as finally spotted a 'fountain' in a galaxy far, far away.
Technicians prepare Swift’s UVOT for vibration testing on Aug. 1, 2002, more than two years before launch, in the High Bay Clean Room at NASA’s Goddard Space Flight Center in Greenbelt, Md.
NASA's Goddard Space Flight Center
The Swift Observatory passed a milestone: 1 million snapshots of the universe. These exquisite and revealing pictures have captured the births and deaths of stars, gravitational waves and comets.
It's all about the strong gravitational field of the black hole.
A detector buried under more than a mile of ice in Antarctica has detected a high-energy subatomic neutrino and traced it to its origin, a blazar – a gargantuan black hole more than a billion times more massive than the sun.
Nobody knows for sure where black holes lead to.
The pull created by a black hole is so strong that if you get too close to one – even if you are travelling away from it at the fastest speed it is possible to go – you will never be able escape.
Artist conception of a tidal disruption event (TDE) that happens when a star passes fatally close to a supermassive black hole.
Sophia Dagnello, NRAO/AUI/NSF.
A team of astronomers captured the moment when a wayward star was pulled into the mouth of a supermassive black hole.
An artist’s illustration of a black hole “eating” a star.
Astronomers are gathering an exponentially greater amount of data every day – so much that it will take years to uncover all the hidden signals buried in the archives.
Top-down artist depiction of a tiny black hole and a pileup of gas and matter swirling toward the center.
The little-known Rossi X-ray Timing Explorer spacecraft was like a Geiger counter for the universe, listening to black holes and zombie stars.
Fact or fiction? Either way, an alien still seems menacing.
Cindy Zhi/The Conversation
Stephen Hawking raised the public profile of grand science, and speculated about the future of artificial intelligence, as well as contacting aliens. Does science mix easily with science fiction?
The Milky Way seen in infrared.
NASA/JPL-Caltech/S. Stolovy (SSC/Caltech)
There could be thousands of black holes at the heart of the Milky Way.
What goes in doesn’t go out?
The famous cosmologist was closely identified with black holes due to his revolutionary theoretical work explaining some of their mysterious properties.
Stephen Hawking both warned about and benefited from artificial intelligence.
Despite his fears artificial intelligence might one day overtake humanity, Stephen Hawking knew from his own life how profoundly AI could improve humans' daily lives.
UK's Astronomer Royal Martin Rees shares his memories of the physicist Stephen Hawking, who has died at the age of 76.
British theoretical physicist and cosmologist, Professor Stephen Hawking in 2014.
Stephen Hawking inspired people with his work on black holes and other mysteries of the universe. Many were quick to pay tribute to the theoretical physicist who died today in the UK, aged 76.
Stephen Hawking at Gonville & Caius College, Cambridge in 2015.
Hawking's most famous book, A Brief History of Time, sold 10 million copies and was translated into 40 languages, skyrocketing to the top of the bestseller lists in the US and UK.
ns gw art.
From a slow hum to a chirp or a bleep, what is that sound you hear whenever there's a new detection of gravitational waves?
Jets from Centaurus A.
ESO/WFI (Optical); MPIfR/ESO/APEX/A.Weiss et al. (Submillimetre); NASA/CXC/CfA/R.Kraft et al. (X-ray
Jets from supermassive black holes behave in mysterious ways. Now scientists have now worked out what's really going on.
An artist’s impression of a supermassive black hole at the centre of a galaxy.
Black holes may come in many sizes, but there's still a gap in the middle. The hunt is on to solve the mystery of where are the intermediate size black holes.