A view of the central region of the Perseus galaxy cluster, one of the most massive objects in the universe, shows the ...

Did primordial black holes born during the Big Bang swallow the universe's antimatter, allowing matter to dominate the cosmos ...

Image Credit: Survival World ...

An underwater observatory recently detected a startlingly energetic cosmic neutrino. One possible cause involves a phenomenon ...

In 1916, only a year after Albert Einstein had published his general theory of relativity, Karl Schwarzschild used mathematical calculations to show this: If sufficient mass could be placed into an ...

On November 12, 2025, a ripple passed through the fabric of spacetime and triggered alarms at three gravitational-wave ...

General relativity stands as one of the bedrock theories in modern physics. Its strange view of relative time and space has been confirmed by countless experimental and observational tests, from ...

It may well take years to prove, but a pair of University of Miami astrophysicists could be on the verge of a cosmic ...

Some things in cosmology may simply be unknowable. Why is there something rather than nothing? What lies outside the universe? What is inside a black hole? That last one has been niggling at ...

A gravitational wave signal recorded by the LIGO, Virgo, and KAGRA detectors on November 12, 2025, has drawn intense ...

Here’s what you’ll learn when you read this story: Most supermassive black holes lurk in the nuclei of galaxies, surrounded by stars and glowing with haloes of superhot matter, which swirls inward ...

Merging black holes and neutron stars have unusual oval orbits prior to colliding and merging, which challenge the laws of physics.