The universe’s expansion rate was supposed to be a solved problem, yet the latest high precision map of the early cosmos has pushed one of modern astronomy’s sharpest conflicts back to center stage.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The Coma Cluster, as seen ...

The Hubble Space Telescope celebrates 36 years of incredible discoveries, stunning imagery, and a lasting impact on astronomy.

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their results match “local” measurements but clash with early-universe estimates, ...

Just about everyone has heard of NASA’s Hubble Space Telescope — not too surprising considering that it has been with us for the past 35 years. For the majority of people alive today, the HST has been ...

It's well established that the universe is expanding, but there's serious disagreement among scientists over how fast it's happening. Two of our best ways of measuring the cosmic expansion rate, the ...

The Hubble Space Telescope as seen from the Space Shuttle Discovery in December 1999. Credit: NASA In the summer of 1995, Robert Williams, then director of the Space Telescope Science Institute, which ...