A massive star may have burst, leaving behind two dense, dead cores, which then collided and caused another explosion ...

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

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

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.

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

A mysterious cosmic explosion linked to gravitational waves may reveal a previously unknown type of supernova event - a ...

The bright binary star system V Sagittae will flare up multiple times before finally going supernova within the next 100 years. When it explodes, it could be visible to the naked eye even in sunlit ...

Astronomers are witnessing a celestial drama unfold in the V Sagittae star system, located 10,000 light-years away. A dense ...

Astronomers have spotted the longest gamma-ray burst ever seen, a cosmic explosion that lasted seven hours — and they determined it could be the work of a black hole destroying a star.

Columbia Professor Brian Metzger helped other astronomers interpret their observations of the unexpected stellar event.

Astronomers using AI have captured a once-in-a-lifetime cosmic event: a massive star’s violent death triggered by its black hole companion. The explosion, known as SN 2023zkd, not only produced a ...

A dozen luminous blue outbursts were thought to be unusual supernovae. A new outburst, the brightest yet, suggests it's ...