The local universe may be expanding more slowly than previously thought, a discovery that could relieve a pesky discrepancy ...

Light released by a distant star does not simply wink out after crossing some threshold of space. In a vacuum, photons keep moving indefinitely, and astronomers routinely detect light that has ...

Astronomers have tracked a powerful blast of radiation back to its source, finding a neutron star collision within colliding ...

Cosmic voids may seem like the emptiest places in the universe, stripped of matter, radiation, and even dark matter. But they’re far from nothing. Even in these vast empty regions, the fundamental ...

A new three-volume study explores how quantum physics, gravitation and cosmology may be understood within a unified ...

Ripples in the fabric of space-time called gravitational waves may be the key to solving the Hubble tension — one of the ...

Gravity is by far the weakest of nature’s four fundamental forces, and physicists have spent decades asking a deceptively simple question: why? One answer, first sketched a century ago and refined ...

A century ago, Edwin Hubble began the race to the edge of the cosmos Damond Benningfield In 1930, Albert Einstein met with astronomers (including Edwin Hubble, at Einstein's left, back row) at Mount ...

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

Mysterious blasts of radio waves from across the universe called fast radio bursts help astronomers catalog matter. ESO/M. Kornmesser, CC BY-SA Chris Impey, University of Arizona If you look across ...