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Hubble clocks faster cosmic expansion


A Hubble Space Telescope image of the galaxy UGC 9391, one of the galaxies in the new surveyImage copyright NASA/ESA Image caption A Hubble Space Telescope image of UGC 9391, one of the galaxies in the new survey

The Universe may be expanding up to 9% faster than previously thought.

This new assessment comes from the Hubble Space Telescope, which has significantly refined the rate at which nearby galaxies are observed to be moving away from each other.

It reinforces the tension between what we see happening locally and what we would expect from the conditions that existed in the early cosmos.

These have implied a much more sedate trajectory for the recession.

Science now has a big job on its hands to try to resolve the conundrum, says Adam Riess from the Space Telescope Science Institute (STScI) and the Johns Hopkins University, both in Baltimore, Maryland, US.

"To be honest, with this latest measurement we've really gone beyond what we might call 'tension';