The supermassive black hole at the heart of our galaxy isn't just spinning — it's doing so at almost maximum speed, dragging anything near it along for the ride.
Physicists calculated the rotational speed of the Milky Way's supermassive black hole, called Sagittarius A* (Sgr A*), by using NASA's Chandra X-ray Observatory to view the X-rays and radio waves emanating from outflows of material.
