Now, researchers using data from the Atacama Large Millimeter/Submillimeter Array (ALMA) telescope operated by the European Southern Observatory in Chile have documented a puzzling phenomenon happening near the location of Sagittarius A*, the location at the heart of the Milky Way believed to be a black hole.
It seems that the supermassive black hole is blinking in our direction.
Hot gasses, dust, and debris form a halo around the black hole known as an accretion disk.