Universe Expansion Rate Deepens Physics Mystery
The James Webb Space Telescope’s observations of Cepheid variable stars in 2024 intensified a fundamental cosmic puzzle. These massive stars, 100,000 times brighter than our sun, show an expansion rate that conflicts with theoretical models. The discrepancy between observed values and predictions suggests either errors in our cosmological models or the existence of unknown physical phenomena. This “Hubble tension” challenges our basic understanding of how the universe evolves.