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Webb identified the source of a super bright flash of light known as a gamma-ray burst: a supernova that exploded when the Universe was only 730 million years old. Image credit: NASA / ESA / CSA / STScI / A. Levan, IMAPP / A. Pagan, STScI.

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Webb Detects Earliest-Known Supernova Explosion

December 11, 2025

Astronomers using the NASA/ESA/CSA James Webb Space Telescope have discovered a supernova explosion accompanying the gamma-ray burst event…