There's evidence out there for the supernova model of black hole formation. This is when a dying star erupts in a colossal ...

Create a Physics World account to get access to all available digital issues of the monthly magazine. Your Physics World ...

Stellar-mass black holes typically form after a star goes supernova and collapses. However, the discovery of the first-ever triple black hole system, V404 Cygni, complicates that picture. This black ...

A third, tenuously held companion to the known binary V404 Cygni may signal that at least some black holes form "gently." ...

Astronomers have stumbled upon something truly remarkable: a black hole that's not just part of a binary system, but part of ...

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 ...

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.

"Overall, it's not surprising that black holes should be in triples, but what's surprising is that this system held onto the outer star after forming the black hole." ...

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 ...

But astronomers said finding this new system – comprising a black hole named V404 Cygni and two stars – is “super exciting” because it raises the possibility there may be more of these out there. The ...