The JWST Just Identified A Supernova From Only 730 Million Years After The Big Bang

These artist's illustrations show an ancient Gamma-Ray Burst (left) only 730 million years after the Big Bang, that was detected in March, 2025. Its jets are a telltale sign of a GRB. The illustration on the right shows the supernova responsible for the GRB. Image Credit: NASA, ESA, CSA, STScI, Leah Hustak (STScI)

The NASA/ESA/CSA James Webb Space Telescope has confirmed the source of a super-bright flash of light known as a gamma-ray burst, generated by an exploding massive star when the Universe was only 730 million years old. For the first time for such a remote event, the telescope provided a detection of the supernova’s host galaxy. Webb’s quick-turnaround observations verified data taken by telescopes around the world that had been following the gamma-ray burst since its onset, which occurred in mid-March.

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