If gravitation is slow, even if “slow” means that it moves at the speed of light, Newton’s gravity doesn’t work, after all.

How does gravity work? Gravity applies an effective force of mutual attraction to things with inertial mass, including physical matter and photons.

Einstein’s Theory of General Relativity is currently our best approximation of how the universe ticks. But there are holes.

"This work is a step toward understanding how quantum mechanics and gravity work together, a major unsolved problem in physics." The first step toward quantum gravity, the "holy grail of physics ...

Dark energy may have a completely unknown aspect of physics acting as an accomplice in its efforts to defy gravity, suppressing the growth of large-scale structures like galaxy superclusters.

A theoretical physicist in England has won a prestigious award for her work on the theory of massive gravity, which could explain why gravity hasn’t constrained the rapid expansion of the ...

And Stephen Hawking, whose work on singularities and black holes in General Relativity rival Penrose’s in importance, but who cannot be awarded a Nobel any longer, as there are no posthumous ...

So, to test GR in extreme gravity, the researchers conducted observations of a massive three-star system known as PSR J0337+1715, located 4,200 light-years from Earth, which was discovered by the ...

Behind the headlines and news conferences announcing the discovery were decades of hard work, hundreds of scientists and more than a billion dollars in taxpayer funds.