A technique called echo mapping suggests supermassive black holes, like that at the heart of the Milky Way, are surrounded by clusters of dark matter.
Astronomers have used a technique called echo mapping to detect hints that supermassive black holes, such as the cosmic titan at the heart of the Milky Way, known as Sagittarius A* (Sgr A*), are surrounded by dense clouds and clusters of dark matter.... [3892 chars]