Black Hole Consumes Star in Record-Breaking Gamma-Ray Burst

Last summer, astronomers witnessed an unprecedented cosmic event: the longest gamma-ray burst (GRB) ever recorded. The event, designated GRB 250702B, lasted for seven hours and emitted multiple gamma-ray bursts, prompting scientists to investigate its unusual characteristics. One leading hypothesis suggests a black hole consumed a star, triggering the extraordinary outburst.

What are Gamma-Ray Bursts?

Gamma-ray bursts are the most powerful explosions in the universe, releasing more energy in a fraction of a second than our Sun will in its entire 10-billion-year lifespan. Typically, these bursts are short-lived, lasting only seconds or minutes.

The Unprecedented GRB 250702B

Detected on July 2, 2025, by the Fermi Space Gamma-ray Telescope, GRB 250702B defied expectations. It not only lasted for an astonishing seven hours but also exhibited three distinct gamma-ray bursts within that period, followed by an afterglow that persisted for months. Since the first GRB was detected in 1973, approximately 15,000 such events have been observed, but none have matched the duration and complexity of GRB 250702B.

The Black Hole Consumption Theory

Scientists are actively working to understand the cause of this exceptional event. One prominent theory, proposed by Jonathan Granot of the Open University of Israel and colleagues, posits that a medium-sized black hole—ranging from a few hundred to 100,000 times the mass of our Sun—disrupted and consumed a star.

This process would involve the black hole tearing the star apart, forming a disk of material around it, and then gradually consuming the stellar debris. The consumption would release extreme relativistic polar jets of gamma rays, which were detected by the Fermi telescope. The repetition of gamma-ray bursts from the same location supports this theory, suggesting the black hole didn’t consume the star all at once.

Location and Implications

GRB 250702B was observed approximately 18,600 light-years from the center of its host galaxy, a region where wandering medium-sized black holes are expected to reside. If this theory is confirmed, it would represent the first direct observation of a star being consumed by a medium-sized black hole, marking a significant event in our understanding of the universe.

Ongoing Research

Although the black hole consumption theory is compelling, further research is needed to verify it. Scientists continue to analyze data from NASA satellites and other facilities to unravel the mysteries surrounding GRB 250702B and gain deeper insights into the extreme phenomena occurring in the cosmos.