Scientists say it's possible to use tiny ripples in space and time, or gravitational waves, to measure the rate at which our ...

Last year, our most detailed map of the universe yet suggested our understanding of dark energy has been wrong for decades. The shock result is reigniting the search for a better cosmic story ...

The shape of the cosmos depends on a balance of two competing forces: the pull of gravity and the expansion driven by dark ...

Astronomers have long known the universe is expanding—but exactly how fast remains one of the biggest mysteries in cosmology. Different techniques for measuring the Hubble constant stubbornly disagree ...

When you look up at the night sky, it appears unchanging. But if you look deep enough you will find that the sky is in fact ...

That the universe is expanding has been known for almost a hundred years now, but how fast? The exact rate of that expansion ...