Artist’s interpretation of an array of pulsars being affected by gravitational ripples produced by a supermassive black hole binary in a distant galaxy. Credit: NSF/NANOGrav/Sonoma State ...

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 more than a decade, astronomers quietly watched the most precise clocks in the cosmos, waiting for a barely perceptible shiver in spacetime. Now, after 15 years of patient measurement, they say ...

In September 1977, Voyager 1 was launched to space on a journey to visit Jupiter and Saturn, before heading out to the stars. NASA’s robotic explorer reached the heliopause — leaving the solar system ...

In the last decade, astronomers made a major discovery, confirming the existence of gravitational waves. These long-theorized ripples in spacetime are created when extremely massive bodies such as two ...

It’s been just a few short years since astronomers made the first ground-breaking detection of gravitational waves, which are the ripples in space-time that propagate outward from especially violent ...

An in-depth analysis of this background hum is already unraveling the mysteries surrounding the growth and merging of supermassive black holes. June 28, 2023, Mountain View, CA – Gravitational waves ...

Gravitational waves play a cosmic symphony as they pass through our galaxy. Today the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) Physics Frontiers Center released the ...