Cosmic acceleration endures after corrected supernova analysis
Southampton researchers re-analyze a 2025 Yonsei claim that the universe’s expansion isn’t accelerating and find the result was a false alarm. After correcting for galaxy-mass calibration and local stellar ages in Type Ia supernovae, the data remain consistent with an accelerating universe and dark energy remains needed. The Yonsei team still argues age effects matter in some analyses, but the broader cosmology community will gain more decisive data from upcoming surveys like the Vera Rubin Observatory to settle the issue.
