Just how long has the universe been around? Scientists estimate the universe is 13.8 billion years old, with an uncertainty ...

It can feel like a brain teaser, but the universe is considered everything within the universe. In the expanding universe, ...

A decade ago, astronomers observed gravitational waves for the first time. What has emerged since is a picture of the ...

A new effort to map the rumblings in spacetime caused by enormous black hole collisions paints a surprisingly loud and ...

Known as the Hubble tension, this discrepancy in measurements of the universe's expansion rate has baffled scientists for over a decade.

Analysis - Using the largest gravitational wave detector ever made, we have confirmed earlier reports that the fabric of the universe is constantly vibrating. This background rumble is likely caused ...