XMM-Newton • Black Hole at Core of Distant Galaxy Periodically Brightens Up. 6.2.2022 • An X-ray view of the active black hole at the core of distant galaxy GSN 069, about 250 million light years away, based on data from ESA's XMM-Newton X-ray observatory. The upper part of the animation shows the actual observations, and the graph in the lower part shows variations of the X-ray brightness of the source relative to its ‘dormant’ level. This animation is based on nearly 40 hours of observations o