James Webb Telescope finds ancient galaxy that challenges theories on universe's early transparency.

The James Webb Space Telescope has discovered a galaxy, JADES-GS-z13-1, formed just 330 million years after the Big Bang. The galaxy's bright ultraviolet light suggests it emitted hydrogen radiation, challenging theories about the early universe's transition from opaque to transparent. This discovery, made using JWST's NIRCam, indicates the universe's reionization period began earlier than previously thought, around 700 million years earlier than expected. The findings provide new insights into cosmic dawn and the first stars and black holes.