Two black holes in distinct cosmic events challenge theories, from multiple star devouring to a rare triple system.

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Depicted in this artist’s rendering is the central black hole, V404 Cygni (black dot), in the process of consuming a nearby star (orange body at left), while a second star (upper white flash) orbits ...

But in a new study, published Wednesday (Oct. 23) in the journal Nature, researchers discovered that one of these known binary systems, which contains the black hole V404 Cygni feasting on a ...

In the constellation of Cygnus, some 7,800 light-years from Earth, lurks a real space oddity. There, a black hole in a system named V404 Cygni repeatedly engages in behavior that has simultaneously ...

Astronomers have discovered a third star in the V404 Cygni system, now a rare triple black hole system 8,000 light-years away. This finding challenges existing black hole formation theories ...

An artist's rendition of the black hole X-ray binary V404 Cygni. This is the first time a black hole triple has been discovered. An artist's rendition of the black hole X-ray binary V404 Cygni.

The black hole named V404 Cygni at the beginning seemed to be the same, with a small star that spiraled around it every 6.5 days. However, after a closer look it became obvious that this black hole is ...

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The system, called V404 Cygni, was thought to be a black hole and a companion star, but a second star billions of kilometres away was also found to be gravitationally connected to the duo.