A massive star roughly 2.5 million light-years away in the Andromeda Galaxy has quietly disappeared, and the best explanation is that it collapsed directly into a black hole without producing a ...

The star used to be one of the brightest star in the neighboring Andromeda galaxy.

Their research was guided by a prediction from the 1970s: if a star collapses directly into a black hole, it should briefly ...

DS1, collapsed into a black hole without exploding, revealing how stars die in silent “failed supernova” events.

A stellar black hole is one that’s created from the gravitational collapse of particularly massive stars, typically greater than eight solar masses. For context, one solar mass is about equivalent to ...

In the nearby Andromeda Galaxy, a massive star bright enough to stand out for years has gone dark. Not in a blaze of glory.

Astronomers have witnessed a rare cosmic event: a massive star that didn’t explode in a spectacular supernova, but instead ...

What’s the farthest object you can see with only your eyes? Unless you live under extremely dark skies unspoiled by light pollution, the answer is the Andromeda Galaxy (M31), located some 2.5 million ...