X-ray flare from Sagittarius A* (IMAGE) Michigan State University Caption Michigan State University researcher Grace Sanger-Johnson found nine previously undiscovered X-ray flares from Sagittarius A*, the Milky Way’s central supermassive black hole, by sifting through a decade’s worth of X-ray data. This NASA image, published over a decade ago, shows an example of an X-ray flare. Credit NASA/JPL-Caltech Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.