Scientists have used the NASA Nuclear Spectroscopic Telescope Array (NuSTAR), an orbiting X-ray telescope, to capture an extreme and rare
event in the regions immediately surrounding a supermassive black hole.
The Nottingham experiment was based on the theory that an area
immediately outside the
event horizon of a rotating black hole — a black hole's gravitational point of no return — will be dragged round by the rotation and any wave that enters this
region, but does not stray past the
event horizon, should be deflected and come out with more energy than it carried on the way
in — an effect known as superradiance.