'Dancing Ghosts': New Scan of Sky Surprises Astronomers
Ray Norris, Conv
Scanning through data fresh off the telescope, we saw two ghosts dancing deep in the cosmos. We had never seen anything like it before, and we had no idea what they were.
Several weeks later, we had figured out we were seeing two radio galaxies, about a billion light years away. In the centre of each one is a supermassive black hole, squirting out jets of electrons that are bent into grotesque shapes by an intergalactic wind.