The Crab Nebula, one of the most studied remnants of a supernova explosion observed nearly a thousand years ago, has been ...

Animation of the findings by researchers who used time-delay cosmography to independently confirm that the universe’s current ...

Learn how Hubble is measuring the expansion rate of the Universe in this new explainer from NASA's Goddard Space Flight ...

Current physics is speeding toward a breaking point, as astronomers confirm that the Hubble tension in new data.

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

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

For much of the twentieth century, scientists expected the expanding universe to slow over time. The opposite turned out to ...

There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and resolving this could reveal new physics.  Astronomers constantly seek new ways to ...

A team of astronomers using a variety of ground and space-based telescopes including the W. M. Keck Observatory on Maunakea, Hawaiʻi Island, have made one of the most precise independent measurements ...