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 ...

For years, cosmologists have argued over a simple question with an awkward answer: How fast is the universe expanding right ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Two "fans" representing ...

We have known for several decades that the universe is expanding. Scientists use multiple techniques to measure the ...

For almost a century, we have known that the universe is expanding. For several decades, evidence has suggested that the expansion of the universe is accelerating. Crucial to those estimates were the ...

The universe's expansion may actually have started to slow rather than accelerating at an ever-increasing rate as previously thought, a new study suggests. Subscribe to our newsletter for the latest ...

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

For the last 25 years, most scientists have believed that about 70% of the universe is formed by something called ‘’dark ...

The universe is expanding faster than previously thought, according to a team of astronomers using the Hubble Telescope. How much faster? Five to nine percent faster. Initially the expansion of the ...

Last year, our most detailed map of the universe yet suggested our understanding of dark energy has been wrong for decades.

(CNN) — The universe’s expansion might not be accelerating but slowing down, a new study suggests. If confirmed, the finding would upend decades of established astronomical assumptions and rewrite our ...

A physicist proposes that the universe is not empty space, but is a viscous fluid, fueling the expansion and contraction we see.