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

It’s a powerful technique, but small uncertainties at each step can add up, something critics argue may be behind the Hubble ...

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

Hubble’s measurements of today’s expansion rate do not match the rate that was expected based on how the Universe appeared shortly after the Big Bang over 13 billion years ago. Using new data from the ...

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

The universe is expanding, but astronomers still cannot agree on exactly how fast. That mismatch, known as the Hubble tension ...

A cosmic camera hog is helping astronomers figure out the rate of the universe’s expansion. Images of the supernova Refsdal have popped up multiple times in the constellation Leo, thanks to light from ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. The Coma Cluster, as seen by the Hubble Space Telescope. | Credit: NASA/ESA/Hubble Heritage Team ...

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