'Closest black hole' system found to contain no black hole

In 2020 a team led by European Southern Observatory (ESO) astronomers reported the closest black hole to Earth, located just 1,000 light-years away in the HR 6819 system. But the results of their study were contested by other ...

Death spiral: A black hole spins on its side

Researchers from the University of Turku, Finland, found that the axis of rotation of a black hole in a binary system is tilted more than 40 degrees relative to the axis of stellar orbit. The finding challenges current theoretical ...

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