Tag Archives: Cloud

Germangendra is like the earth surrounded, but the whole galaxy has been rinsed. A huge, high-velocity stream of gas is wrapped around the Milky Way, about 200,000 light-years away, most of the way. We know where it comes from, more or less. It is very closely linked to the large …

About 15,000 light-years away, an active black hole periodically appears to illuminate another unremarkable cloud of gas with gamma rays. But there is a catch. The gas cloud is about 100 light-years from the black hole – and just how the cloud pulsates with it in time is a mystery. …