Astronomers had been watching a galaxy far, far away for a long time. It seemed unremarkable. But in December 2019, it suddenly started shining brighter than ever. Now, astronomers believe they ...
NASA's X-ray space telescope Chandra spotted the cosmic collision from the supermassive black hole at the heart of the galaxy Centaurus A.
Imagine the formation of a black hole and you'll probably envision a massive star running out of fuel and collapsing in on ...