Three merging galaxies host three active black holes, offering rare insight into galaxy and black hole growth.

In a patch of sky about 1. 2 billion light-years from Earth, astronomers have found a cosmic rarity: three galaxies caught in ...

In a remarkable breakthrough, astronomers have uncovered the first known triple system where three galaxies, each harboring ...

Three galaxies were found in the merger of a triple system, which was rare in itself, and might help observe hierarchical ...

A new discovery about what happens when a supernova – an exploding star – and a black hole collide could change the way scientists understand the lives and deaths of stars. The finding was the first ...

A supermassive black hole was caught twisting spacetime, offering the clearest real-world evidence yet for Einstein’s frame-dragging theory.

Astronomers have confirmed the first known triple system in which all three galaxies host actively feeding, radio-bright ...

A black hole that was eaten by a star seems to have gotten revenge by consuming the star from the inside, producing a gamma-ray burst spotted about 9 billion light-years from Earth. The burst, called ...

New simulations suggest magnetic fields hold the key to forming black holes that defy known mass limits. When powerful magnetic forces act on a collapsing, spinning star, they eject vast amounts of ...

WASHINGTON (Reuters) -Astronomers have observed the calamitous result of a star that picked the wrong dance partner. They have documented what appears to be a new type of supernova, as stellar ...