An extraordinary cosmic event, a 7-hour-long gamma-ray burst named GRB 250702B, has captivated scientists and astronomers worldwide. This rare occurrence, detected on July 2, 2025, by NASA's Fermi Gamma-ray Space Telescope, has challenged our understanding of the universe. Located 8 billion light-years away in the constellation Scutum, this burst was the longest-recorded gamma-ray burst, lasting over seven hours. The burst's origin was a massive, dusty galaxy, making it nearly invisible in visible light. Astronomers employed various telescopes, including the Gemini telescopes in Chile and Hawaii, the Very Large Telescope in Chile, the Keck Observatory in Hawaii, and the Hubble Space Telescope, to unravel its mysteries. The burst's duration and the dust in its host galaxy presented a unique challenge, as it didn't fit into existing models of gamma-ray burst causes. The burst's origin remains a subject of debate, with theories suggesting it could have been caused by the death of a massive star, a star being torn apart by a black hole, or the merger of a helium star and a black hole. As scientists continue to study this phenomenon, it will serve as a benchmark for future discoveries, helping astronomers understand the diverse nature of gamma-ray bursts.
