Scientists capture strange signals
GET excited. Australian scientists have made a world first discovery that could change everything we know about space. [..] Ms Petroff said the origin of the source remained a mystery, but the researchers believed it had to be huge, cataclysmic and up to 5.5 billion light years away. Ref. Source 2
Clandestine black hole may represent new population
Astronomers have concluded that a peculiar source of radio waves thought to be a distant galaxy is actually a nearby binary star system containing a low-mass star and a black hole. This identification suggests there may be a vast number of black holes in our Galaxy that have gone unnoticed until now. Ref. Source 7y.