... Tonight's Sky . ... Behemoth black hole found in an unlikely place . Gravitational wave search provides insights into galaxy evolution and mergers . ... galaxies . ... Mysterious quasar sequence explained . ... A growing black hole, called a quasar, can be seen at the center of a faraway galaxy in this artist's concept. ... Quasars are supermassive black holes that live at the centers of distant massive galaxies. ... Only registered members of Astronomy.com are allowed to comment on this article. ...