For years, cosmologists have argued over a simple question with an awkward answer: How fast is the universe expanding right ...

A subtle gravitational-wave “hum” from merging black holes may help settle the cosmic fight over how fast the universe is ...

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 ...

The Atacama Cosmology Telescope’s final data release confirms a major cosmic discrepancy and rules out many attempted solutions.

The James Webb Space Telescope has uncovered traces of colossal, short‑lived stars that blazed out in the universe’s first few hundred million years, leaving behind only their violent signatures.

To study the origin and evolution of the universe, physicists rely on theories that describe the statistical relationships between different events or fields in spacetime, broadly referred to as ...

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 ...

A quiet shift in the numbers behind the universe’s growth is pushing scientists toward a bold possibility. Two of the cosmos’ ...

RIVERSIDE, Calif. -- Supermassive black holes — with masses ranging from millions to billions of times that of our sun — sit at the centers of most large galaxies. Astronomers have observed such black ...

We have known for several decades that the universe is expanding. Scientists use multiple techniques to measure the present-day expansion rate of the universe, known as the Hubble constant. These ...

A closer look at the Lambda Cold Dark Matter model, its core components, supporting evidence, and why new observations are ...