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NASA Detects Record-Setting Gamma-Ray Burst from Distant Galaxy

12/15/2025

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Summary

Story summary

On July 2, 2025, NASA's Fermi Gamma-ray Space Telescope detected GRB 250702B, the longest burst on record.
The burst came from a dusty galaxy about 8 billion light-years away and emitted in infrared and X-ray wavelengths.
Researchers used telescopes, including James Webb Space Telescope, to study its afterglow.
Lead author Jonathan Carney says GRB 250702B challenges models and may result from a massive star's death, black-hole disruption, or helium-star merger.

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Story summary

On July 2, 2025, NASA's Fermi Gamma-ray Space Telescope detected GRB 250702B, the longest burst on record.
The burst came from a dusty galaxy about 8 billion light-years away and emitted in infrared and X-ray wavelengths.
Researchers used telescopes, including James Webb Space Telescope, to study its afterglow.
Lead author Jonathan Carney says GRB 250702B challenges models and may result from a massive star's death, black-hole disruption, or helium-star merger.