The gravitational-wave background would be an even better primordial probe, Dr. Mingarelli said, because it would have been emitted almost instantaneously.

To detect the gravitational wave background, astronomers studied fast-spinning stars called millisecond pulsars, which are dead stars that spin up to 700 times per second with astonishing ...

The gravitational wave background, a kind of cosmic noise that has long been theorized but never detected, is made up of ultra-low-frequency gravitational waves.

Not only is the background there, it’s stronger than anyone anticipated. “The gravitational wave background is about twice as loud as what I expected,” Mingarelli said.

The gravitational waves we’ve detected so far have been like tsunamis in the spacetime sea. Now, a 13-year survey of light from pulsars scattered across the galaxy may have revealed the first ...

This is a far lower frequency than the gravitational-wave events detected by LIGO and Virgo, which ranges from 5 to 20,000 Hz. The corresponding wavelength of these background gravitational waves is ...

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We believe there is a gravitational wave background that is composed of millions of slowly merging pairs of supermassive black holes. In 2023 we found evidence of this, and the next big thing is ...