Time Dilation: Quasars Unveil Slow-Motion Universe

A recent study has detected the cosmological time dilation of high-redshift quasars, providing further evidence for the expansion of the universe. By analyzing the optical variability of quasars with long-term photometric light curves, researchers used Gaussian process regression to measure the time dilation effect caused by the stretching of light waves as the universe expands. The findings support the predictions of general relativity and contribute to our understanding of the evolution of the universe.