Two Supermassive Black Holes On A Collision Course Discovered

Slowly drawing closer together in a death spiral, the supermassive pair will start sending gravitational waves that will rip through space-time. The mass of each black hole is stated to be over 800 million times that of our sun.

Even before the destined collision, the gravitational waves emanating from the supermassive black hole pair will dwarf those previously detected from the mergers of much smaller black holes and neutron stars.
"Supermassive black hole binaries produce the loudest gravitational waves in the universe," says co-discoverer Chiara Mingarelli, an associate research scientist at the Flatiron Institute's Center for Computational Astrophysics in New York City. Gravitational waves from supermassive black hole pairs "are a million times louder than those detected by LIGO."

The pair of black holes is found to be 2.5 billion light years away from Earth.

Find out more about this on EurekAlert.

(Image Credit: A.D. Goulding et al./Astrophysical Journal Letters 2019)

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Correction - they probably collided something like 2 billion years ago and we're just getting around to watching the beginning of it.
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