The James Webb Space Telescope has measured the expansion rate of the Universe, and the results are not great news for the biggest crisis in cosmology.
Webb confirms accuracy of universe's expansion rate, deepens mystery of Hubble constant tension phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.
"Until the 1990s, there were few reliable observations about movement at the scale of the entire universe, which is the only scale dark energy effects. So dark energy could not be seen until we could measure things very, very far away." -Adam Riess