Webb’s Precise Measurements Illuminate the Universe’s Expansion Mystery

The Hubble constant’s measurement discrepancy, known as the Hubble Tension, has been a significant puzzle in cosmology. The James Webb Space Telescope’s confirmation of the Hubble Space Telescope’s data has solidified the cosmic distance ladder’s accuracy and suggested that the discrepancy might hint at unknown cosmic phenomena, demanding further investigation.Show more

The rate at which the Universe is expanding, known as the Hubble constant, is one of the fundamental parameters for understanding the evolution and ultimate fate of the cosmos. However, a persistent difference, called the Hubble Tension, is seen between the value of the constant measured with a wide range of independent distance indicators and its value predicted from the afterglow of the Big Bang. The NASA/ESA/CSA James Webb Space Telescope has confirmed that the Hubble Space Telescope’s keen eye was right all along, erasing any lingering doubt about Hubble’s measurements.