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4w ago

James Webb Telescope Reveals Galaxy Shaping Early Universe

JADES-GS-z13-1, observed 330 million years after the Big Bang, provides evidence of early cosmic reionization with strong Lyman-α emission.

An area of deep space observed by the James Webb Space Telescope is covered by a scattering of galaxies as well as a few nearby stars, and a small square is shown zoomed in, in the center of which, a red dot is the galaxy JADES-GS-z13-1, observed as it was 330 million years after the Big Bang, in this undated handout image. ESA/Webb, NASA & CSA, JADES Collaboration, J. Witstok, P. Jakobsen, A. Pagan (STScI), M. Zamani (ESA/Webb)/Handout via REUTERS
Image

Overview

  • The James Webb Space Telescope identified JADES-GS-z13-1, a galaxy from 330 million years after the Big Bang, making it one of the earliest known galaxies.
  • Strong Lyman-α emission from the galaxy suggests it is surrounded by a bubble of ionized hydrogen, indicating cosmic reionization began earlier than previously believed.
  • Scientists are investigating whether the ultraviolet radiation originates from massive, hot stars or a supermassive black hole within the galaxy.
  • The discovery challenges existing theories on early galaxy formation and the timeline of reionization, prompting a reevaluation of cosmological models.
  • Further observations are planned to explore the nature of the galaxy and the source of its unexpectedly strong ultraviolet radiation.