There are two main ways to measure time: dynamic and atomic. Dynamic simply means motion. How long does it take the Earth to revolve around the sun?

Intense gravitational lensing means you’d be able to see much more of a neutron star standing on its surface than you would ...

Another interesting consequence of relativity is that as time stretches out at high speeds, distances diminish. It’s hard to ...

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 ...

This week, researchers reported finding a spider megacity in a sulfur cave on the Albania-Greece border, and experts say that ...

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

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

Astronomers at the Palomar Observatory of the California Institute of Technology have recorded the most powerful radiation ...

What’s the rarest thing you can see in the universe?” Astronomers now have a contender: a supermassive black hole tearing apart a colossal star and unleashing a flare so luminous it outshines 10 ...

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

In a paper published in The Astrophysical Journal Letters, the international LIGO-Virgo-KAGRA Collaboration reports on the detection of two gravitational wave events in October and November of 2024 ...

According to the study, interstellar object 3I/ATLAS showcased its first sign of a non-gravitational acceleration at ...