Astronomers recorded the longest gamma-ray burst in history, GRB 250702B, that may be a cosmic event completely new to science.
Astronomers report the longest gamma-ray burst ever recorded, confirmed in a new paper. The signal, labeled GRB 250702B, flashed for about 7 hours after NASA’s Fermi telescope first saw it on July 2, 2025.
The team argues the engine was not a normal ... [5050 chars]