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

The Dark Energy Survey (DES) offers new insights into cosmic expansion and dark energy, gathered over six years and 758 nights of observations.

Investigating the history of our cosmos with a large sample of distant ‘active’ galaxies observed by ESA’s XMM-Newton, a team of astronomers found there might be more to the early expansion of the ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of galaxies curving the fabric of space-time in an expanding universe. A new ...

Two ways of measuring how fast the universe is expanding disagree, a puzzle known as the Hubble tension. Tiny magnetic fields ...

NASA’s Nancy Grace Roman Space Telescope will conduct a wide-area survey to study dark matter, dark energy, and the expansion of the universe across 11 billion light-years.

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 ...

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding? Astronomers have tried two main methods to figure it out, but their numbers don’t ...

The Universe is not only expanding, but its expansion even seems to be speeding up. What is causing this acceleration, modestly concealed under the term dark energy? Research conducted as part ...

The universe is expanding; we’ve had evidence of that for about a century. But just how quickly celestial objects are receding from each other is still up for debate. It’s no small feat to measure the ...