“We showed that if black hole morsels are created during mergers, they would produce a burst of high-energy gamma rays, with the delay time related to their mass,” Dr. Cacciapaglia said. “Our analysis ...

You might think astronomers have seen it all, but the universe still throws us occasional new mysteries to keep us on our ...

A cosmic explosion known as GRB 250702B is by far the longest gamma-ray burst astronomers have ever seen—if it’s even one at ...

Watch an animation of a black hole shooting jets of particles through a "collapsing star at nearly the speed of light" and ...

When space telescopes blazed with high-energy radiation for hours earlier this year, astronomers suspected that they were witnessing something special. The cosmic flash GRB 250702B was no ...

In a first-of-its-kind experiment, scientists have recreated "cosmic fireballs" here on Earth in a particle accelerator.The ...

On July 2, 2025, NASA's Fermi Gamma-ray Burst Monitor (Fermi-GBM) captured around three hours' worth of signals that appeared to come from the same source. When scientists compiled this data with ...

Astronomers observed the fading light of supernova SN 2025kg, which followed the fast X-ray transient (FXT) named EP 250108a.

New observations from the James Webb Space Telescope have uncovered five complex organic molecules trapped in the ice around a star outside our galaxy. This cosmic first hints that the stuff of life ...

Joyce's nebula scene captures the expanding shell of the supernova remnant CTB 1, also known as both the Garlic Nebula and ...