For the first time, a black hole has been discovered with two orbiting stars, leading astrophysicists to suggest a surprising way such systems could form. Many black holes have been discovered in binary systems. These pairs involve a central black hole and another object such as a star, denser neutron star or another black hole. An artist’s rendition of the black hole X-ray binary V404 Cygni. Credit: Jorge Lugo. The first triple system, described in a paper published in Nature, includes a black ...