There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and ...

New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from the early cosmos.

Explore the evidence that supports the theory of the expanding universe, including the observations of distant galaxies and ...

The Atacama Cosmology Telescope in Chile not only confirmed one of the greatest mysteries in the universe—it also ruled out ...

The three Sonic movies thus far have together brought in more than $1.2 billion globally, so it's no surprise to see ...

A team of astronomers using a variety of ground and space-based telescopes including the W. M. Keck Observatory on Maunakea, ...

Until recently, Type Ia supernovae have been treated by cosmologists as the gold standard of cosmic distance determination: quite uniform “standard candles” whose peak brightness was reliable over all ...

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 ...

It’s always amazing, and more than a little humbling, when the universe reminds us that our “common sense” is provincial, ...

Will the universe keep existing forever? An astrophysicist explains how scientists aren’t entirely sure, but they can make predictions.