"JWST Revolutionizes Understanding of Early Galaxies and Cosmic Evolution"
The James Webb Space Telescope (JWST) has challenged astronomers' understanding of early galaxies by revealing that fully-formed galaxies similar to those seen today existed in the early Universe, contrary to the belief that the chaotic early years would disrupt their shapes. Previous observations with the Hubble Space Telescope (HST) showed peculiar and irregular shapes in ancient galaxies, but the JWST's infrared capabilities have provided clearer images, demonstrating that disk galaxies formed much earlier than anticipated. These findings overturn previous assumptions about galaxy formation and evolution, prompting astronomers to rethink their understanding of the first galaxies and the processes that shaped them over the past 10 billion years.