"Satellite Galaxies' Motion Indicates a Younger Universe"
Observations of the motion of satellite galaxies around massive galaxy groups suggest that the universe may be younger than predicted by the standard cosmological model with Planck cosmological parameters. Research using data from the Sloan Digital Sky Survey (SDSS) indicates a notable excess of correlated satellite pairs, implying that massive galaxy groups are younger in the real universe compared to current simulations. These findings challenge the existing cosmological model and may provide insights into the Hubble tension problem.