How do we know the speed of light – and why does it have a speed limit at all? Leah Crane explores the history of one of the ...

A colossal black hole 10 billion light-years away has been caught devouring one of the universe’s biggest stars, unleashing a ...

The most massive stars in the universe are destined to explode as brilliant supernova before collapsing into black holes. Yet ...

Astronomers have detected the most distant and biggest black hole flare ever seen, the result of a black hole ripping apart ...

This artist's concept depicts a supermassive black hole in the process of shredding a massive star—at least 30 times the mass ...

Data from the NSF-funded Zwicky Transient Facility pinpointed the energy source: J2245+3743, an active galactic nucleus 500 ...

Physicists have recently proposed a radical idea that challenges our understanding of the universe. They suggest that ...

Astronomers have captured the most powerful and farthest black hole flare ever recorded—a cosmic light show so bright it ...

A new theory claims dark matter and dark energy don’t exist — they’re just side effects of the universe’s changing forces. By ...

A mathematical investigation of galactic data suggests elusive dark matter is confined to the rules of gravity.