Shrouded in mystery for decades, gamma-ray bursts are the brightest explosions since the Big Bang and emerge from only the most violent cosmic events.

Over 90% of the gamma-ray flashes come from galaxies called blazars, which are powered by feeding supermassive black holes. When you purchase through links on our site, we may earn an affiliate ...

Gamma-ray bursts come in two flavors, long and short. The former, which can last up to several minutes or so, are thought to result from stars more than 20 times the mass of our sun collapsing ...

A year ago, astronomers discovered a powerful gamma-ray burst (GRB) lasting nearly two minutes, dubbed GRB 211211A. Now, that unusual event is upending the long-standing assumption that longer ...

A scientist in California has taken steps toward a long-sought gamma ray laser by harnessing positronium bubbles in special liquid helium. Positronium is a volatile, short-lived atom that seems ...

Some gamma-ray bursts (GRBs) last for only a fraction of a second — some as long as a minute (and even one that lasted as long as seven hours) — and beam so much energy in a focused ...

The emission of gamma rays with energies around 50GeV was quite a bit brighter than expected. To make it even more confusing, there were no obvious sources for the gamma rays.