JWST spots the earliest sign yet of a distant galaxy reshaping its cosmic environs
SMRTR summary
The James Webb Space Telescope has detected Lyman-α light from galaxy JADES-GS-z13-1, 330 million years post-Big Bang, providing the earliest evidence of cosmic reionization. The galaxy's strong signal implies it created an ionized gas bubble, enabling light to reach us. This suggests early galaxies may be more efficient at reheating the universe than previously believed, possibly due to a supermassive black hole or hot, massive stars.
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