"Unraveling Cosmic Distances: The Role of Space Telescopes in Redshift Mysteries"

The James Webb Space Telescope (JWST) is using redshift analysis and advanced imaging to study galaxy evolution in the early universe. By analyzing light from distant galaxies, astronomers can determine their age and the conditions of the early universe. The JWST's NIRCam and NIRSpec instruments have identified galaxies with high photometric redshifts, including one at redshift 11.4, corresponding to when the universe was just 390 million years old. These findings underscore the importance of spectroscopic data for confirming the distances and properties of these early galaxies, enhancing our understanding of cosmic history.