Black hole 'UFO' caught at critical moment in scientific first

For the first time, astronomers have caught the moment when a supermassive black hole flare triggers a mighty wind blasting out into space at relativistic speeds. The so-called ultrafast outflow, or UFO, was recorded reaching speeds 19 percent of the speed of light in a vacuum – about 57,000 kilometers (35,400 miles) per second. That's not the fastest such outflow ever recorded, but it is the first observation of the onset and evolution of the