Phys.org: X-ray technology reveals never-before-seen matter around black hole.
https://phys.org/news/2018-07-x-ray-technology-reveals-never-before-seen-black.html
Nations stoner station
Phys.org: X-ray technology reveals never-before-seen matter around black hole.
https://phys.org/news/2018-07-x-ray-technology-reveals-never-before-seen-black.html