Black holes belch out intergalactic smoke /cosmosmagazine. com/

Astronomers have just watched the evolution of streamers of gas around an active black hole – and they look a bit like the smoke produced by a volcanic eruption.

The team used the ultra-sensitive Low-Frequency Array (LOFAR) in the Netherlands, as well as the Spektr-RG space observatory, to study a system of 20 galaxies called…