Stellar “ghost” discovered: Astronomers may have detected a “dark” free-floating black hole

Artist’s illustration of a black hole. Gravity microlensing emerges[{” attribute=””>black hole candidate, one of 200 million in the galaxy. When massive stars come to the end of their lives and explode in a supernova, they leave behind a black hole. It is estimated that about one in a thousand stars is massive enough to give … Read more