Using gravitational waves as a measure of the universe's rate of expansion could solve the biggest headache in physics, the ...

Two new studies have measured the expansion of the universe in our immediate cosmic neighborhood using a novel method that ...

AUSTIN (KXAN) — A commonly held belief that the universe is rapidly expanding may be wrong. A new paper published this month suggests the universe’s expansion might be slowing down and it could mean ...

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 ...

Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain forever unknown.

A rare gravitationally lensed supernova could help astronomers determine how fast the universe is expanding and shed light on dark energy. Astronomers may be closer to understanding one of the ...

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 rare gravitationally lensed supernova called SN 2025wny appears in five separate images due to the gravity of two ...

An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be straightforward. Objects are still emitting light, and that light takes time to travel ...

Researchers from the University of Bologna and the Leibniz Institute for Astrophysics Potsdam (AIP) along with other institutes have proposed a new way to address the Hubble tension by comparing ...

About 13.8 billion years ago, the origin of the universe began with the Big Bang. Scientists say all space, time, matter, and ...

Since humanity's earliest days, people have looked up at the stars, using science, art, religion, philosophy, mathematics, and any other tool at their disposal to better understand the complicated and ...