https://www.space.com/milky-way-supermassive-black-hole-weird-flare.html
Tag: black hole
Phys.org: X-ray technology reveals never-before-seen matter around black hole
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