New observations of the James Webb Space Telescope have proved the reality of a cosmological mystery called the Hubble stress. According to the results of the study, published on the arXiv preprint server, the discrepancy in the values of the rate of expansion of the Universe obtained by different methods is not the result of an error.
Scientists analyzed the period/luminosity ratio of cepheids – variable stars whose brightness changes at a rate proportional to their total luminosity. This strict relationship allows the Cepheids to be used as standard candles to determine the distances to galaxies where these variables are located. Since the rate of galaxy escape due to the expansion of the universe is proportional to distance, the Cepheids have been used to determine the Hubble constant.
