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An Explanation For The JWST's Puzzling Early Galaxies

November 14, 2025
An Explanation For The JWST's Puzzling Early Galaxies
By Evan Gough (https://ift.tt/GIyHRhu)

In this JWST image, the galaxy Y1 glows with a red light from heated dust. It's undergoing, or underwent, a period of extremely rapid star formation. If other ancient galaxies experienced the same thing, that can explain why ancient galaxies are so much more massive than astronomers thought they could be. Image Credit: NASA, ESA, CSA (JWST), T. Bakx/ALMA (ESO/NRAO/NAOJ). Licence type: Attribution (CC BY 4.0)

The JWST surprised when it detected very early galaxies that were extremely luminous. This suggested that they were more massive than researchers thought they could be. Not enough time had passed for them to grow so large. New research has an explanation.



November 15, 2025 at 03:50AM
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