A black hole infamous for strange features has once again baffled astronomers, this time with rapid X-ray flashes. What could they be?

The observations made using the European Space ... to show a white dwarf nearing the point of no return - called the event horizon - as it orbits the galaxy's supermassive black hole, according ...

Using the XMM-Newton X-ray telescope, astronomers have witnessed a supermassive black hole ... white dwarf, the researchers theorize that it could be detected using ripples in space and time ...

An artist's concept shows a stream of matter trails a white dwarf (sphere ... Nasa's Laser Interferometer Space Antenna (LISA), which is designed to detect ripples in space-time called ...