How fast is the universe expanding? Galaxies provide one answer

Berkeley CA (SPX) Mar 09, 2021

Determining how rapidly the universe is expanding is key to understanding our cosmic fate, but with more precise data has come a conundrum: Estimates based on measurements within our local universe don't agree with extrapolations from the era shortly after the Big Bang 13.8 billion years ago. A new estimate of the local expansion rate - the Hubble constant, or H0 (H-naught) - reinforces th