A giant star in the Andromeda Galaxy has vanished without a trace, leaving scientists puzzled and intrigued. First observed ...

While two teams have ideas about what happened to yellow supergiant M31-2014-DS1, ultimately, it remains a mystery.

Editor's note: This article (originally published Aug. 13, 2025) has been updated to include new text and illustrations ...

It is theoretically possible for a particularly massive star to collapse in on itself to form a black hole rather than ...

What we know of the birth of a black hole has traditionally aligned with our perception of black holes themselves: dark, ...

Caltech astronomer Mansi Kasliwal and her colleagues were not expecting to chase a mystery that blurred the line between a supernova and a kilonova. Yet that is where the evidence has led after an ...

Massive stars about eight times more massive than the sun explode as supernovae at the end of their lives. The explosions, which leave behind a black hole or a neutron star, are so energetic they can ...