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Gravitational waves have been detected from the biggest black hole merger yet.
Scientists say their exquisitely sensitive laser labs observed the ripples in space-time emanating from this gargantuan collision on 29 July 2017.
The event saw two holes, weighing more than 50 and 34 times the mass of our Sun, uniting to produce a single object over 80 times the mass of our star.
It happened at least five billion light-years from Earth.
https://www.bbc.co.uk/news/science-environment-46428010
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