Seven‑hour gamma‑ray burst in July 2025 is longest on record, suggests exotic black‑hole origin

Telescopes recorded a gamma‑ray burst in July 2025 that lasted seven hours — the longest GRB ever observed when most last milliseconds to minutes. Its unprecedented duration suggests a new, exotic class of explosive event; astronomers say a rare form of black hole is a leading candidate.

Discovered 2025-12-09T11:24:43.978197-08:00 | 2025-12-09T11:24:43.978197-08:00

Briefing

What Hype is tracking

  • The burst lasted seven hours (July 2025), the longest GRB on record versus the usual milliseconds-to-minutes timescale, expanding the range of known high-energy transients.
  • Its duration and properties point to an unfamiliar explosion mechanism with a rare black‑hole scenario among leading explanations, placed in context by the recent two‑year gravitational‑wave observing run that captured 250 mergers (providing complementary black‑hole science) https://hype.aero/?story=693b7cbc-0311-45b8-914e-3eee5dc6973a
  • The event highlights the value of continuous, wide‑field high‑energy monitoring and rapid multi‑observatory follow‑up to characterize rare, long‑duration transients and refine models used by space observatories and sensors.

Reported By

dailygalaxy.com Live Science sci.news newswise.com thedebrief.org cavenewstimes.com
Sources Tracked
10
First Seen
2025-12-09T11:24:43.978197-08:00
Latest Update
2025-12-14T05:28:03.980766-08:00
Coverage
Space

Sources

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