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JWST finds galaxies that carved a bubble in the young universe
🔬 Science

JWST finds galaxies that carved a bubble in the young universe

The James Webb Space Telescope (JWST) has identified a cluster of galaxies in the early universe that created a reionization bubble — a region where radiation ionized neutral hydrogen, allowing photons to travel freely. Before reionization, neutral hydrogen blocked light, making the universe opaque. The discovery provides direct evidence of how galaxies collectively drove this crucial stage in cosmic evolution.

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