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The James Webb Space Telescope (JWST) has discovered surprisingly bright and massive galaxies that existed only a few hundred million years after the Big Bang. These early galaxies appear far more developed than scientists previously expected, challenging existing ideas about how quickly galaxies formed.

A new study of nine early galaxies combined JWST observations with data from the Very Large Telescope (VLT). Researchers found that these galaxies contain many more small, faint stars than previously estimated. Because massive stars are much brighter, earlier observations mainly detected them, causing scientists to underestimate the total mass of these galaxies.

JWST’s exceptional sensitivity has made it possible to detect these previously hidden stars. In one galaxy formed less than 1.5 billion years after the Big Bang, the newly discovered population of small stars suggests that its total mass could be up to four times greater than earlier estimates.

The findings suggest that stars may have formed in different proportions in the early universe than they do today. This could require major revisions to models of galaxy formation and may even mean that more planets formed around small stars in the early universe than scientists previously thought.

Researchers plan to study more ancient galaxies using the same techniques, potentially bringing us closer to understanding the universe’s first stars.

Reference:

Lea, R. (2026, August 20). James Webb Space Telescope Finds Hidden Stars Making the Universe’s First Galaxies Much Bigger Than We Know. Space.Com.

About Coram Deo

Coram Deo — before the face of God. This blog reflects on Scripture, world events, science, music, psychology, and the human mind — always through the lens of Christian faith. All of life is lived before the face of God.