Collision between black hole and ‘mysterious object’ puzzles astronomers

GW190814: A black hole and a neutron star colliding, or something even more unusual? Carl Knox/OzGrav ARC Centre of Excellence On Aug. 14, 2019, a gravitational wave — a massive ripple through the fabric of space-time — washed over the Earth. The wave was detected by sophisticated, fine-tuned lasers in the US and Italy. And […]