Two recently observed black hole mergers, occurring just weeks apart in late 2024, have opened an extraordinary new window ...

Explore the complex challenges of quantum gravity in this video, examining the evolution of gravity models and the necessity ...

Most of the atomic clocks in the world - fewer than 500 in total - are housed at standards institutes and used to keep time ...

It's a plot device beloved by science fiction: our entire universe might be a simulation running on some advanced ...

The theoretical physicist and best-selling author finds inspiration in politics and philosophy for rethinking space and time.

For the first time, scientists have detected two black hole mergers with spins so unusual they may reveal a new generation of ...

Two Caltech historians associated with the Einstein Papers Project have gathered together what they consider to be the most important of Einstein's ...

Theoretical physicist Alex Lupsasca is pushing for a space telescope to glimpse the thin ring of light that is thought to surround every black hole.

As the collapsed core of a massive star, a neutron star is a small but incredibly dense object, packing up to three times the ...

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 ...

New strategies may soon allow scientists to test dark energy theories within our own solar system, linking cosmic-scale physics to local observation. Science advances through a cycle of proposing ...