Astronomers detect black holes swallowing up neutron stars for the first time
CNET
2 hrs ago
© Carl Knox, OzGrav/Swinburne
Astronomers have detected two neutron star-black hole mergers via gravitational waves -- the first time such a discovery has been made.
On Jan. 5, 2020, astrophysicists heard a chirp from a distant part of the cosmos, some 900 million light-years away. The fleeting sound was unlike any they'd heard before and was caused by a great ripple in space-time -- a gravitational wave -- that spread out across the universe from over 900 million light-years away, washing over the Earth and pinging detectors.
Chirp. 
Then, 10 days later, they heard another, similar sound. A cosmic twin. Gravitational waves had once again pinged Earth's detectors. 

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