A research team led by Caltech may have just discovered the first-ever superkilonova, a cosmic phenomenon in which a star ...

A double explosion, in which a dying star split, then recombined, may be a long-hypothesized but never-before-seen "superkilonova." ...

The record-setting cosmic outburst was actually a gamma-ray burst, the most powerful class of cosmic explosions.

Astronomers may have discovered the first example of an explosive cosmic event called a "superkilonova," in the form of a gravitational wave signal detected on Aug. 18, 2025.

This artist’s impression shows a star going supernova. About 22 million light-years away the supernova, SN 2024ggi, exploded in the galaxy NGC 3621. Using the ESO’s Very Large Telescope, astronomers ...

The supernova was the death of a red supergiant star 500 times larger than the sun, in a galaxy just 22 million light-years away. When you purchase through links on our site, we may earn an affiliate ...

XRISM’s high-precision X-ray data revealed unusually strong signatures of chlorine and potassium inside the Cassiopeia A supernova remnant. These levels are far higher than theoretical models ...