James Webb Telescope's Discovery Deepens Hubble Tension Debate

A new measurement of the Hubble constant using a distant supernova challenges existing cosmological models.

The James Webb Space Telescope (JWST) observed a Type Ia supernova named SN H0pe, which is one of the most distant supernovae ever detected.
SN H0pe's light was magnified and split into three images due to gravitational lensing by a galaxy cluster, allowing for a new measurement of the Hubble constant.
The calculated Hubble constant from SN H0pe is 75.4 kilometers per second per megaparsec, aligning with local universe measurements but conflicting with early universe estimates.
This discrepancy, known as the Hubble tension, highlights a significant challenge in cosmology regarding the universe's expansion rate.
The findings suggest that further observations and methods are needed to resolve the Hubble tension and enhance our understanding of cosmic expansion.