Astronomers are closing in on the dark monster at the center of our galaxy. New radio telescope images indicate that an invisible concentration of material at the Milky Way’s core is some 4 million times as heavy as the sun and squeezed into a region no larger than the distance between the sun and Earth. That’s half the distance that previous observations had indicated, making a more compelling case that the concentrated mass must be a black hole.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.