A cosmic explosion detected on July 4, 2025, began with a 0.4-second gamma-ray burst and then continued glowing in softer X-rays for nearly 10 minutes. Astronomers say the unusual signal may have come ...

Astronomers detected GRB 220706A, an ultra-long gamma-ray burst with X-ray flare activity lasting about 27 days after the ...

Gamma rays from the explosion lasted roughly a third of a second. The X-rays kept going for what the research team calls nearly ten minutes, the longest prompt X-ray flash yet seen from a merger of ...

An international team of astronomers has discovered a prolonged X-ray flare associated with a possible merger of compact stars. The gamma-ray burst lasted less than half a second, but the source ...

Dark matter could be a type of matter in the universe that does not emit, absorb or reflect detectable light and appears to interact very weakly with regular matter. Although physicists have observed ...

NIST-developed transition-edge sensors measured interfering X-ray emissions from uranium, plutonium and neptunium with ...