This image may not be used by or to promote the arms, nuclear power or tobacco industries or any religious organisation, or in any discriminatory way, or to imply the endorsement by ESO of any product, service or activity Binary black hole, illustration. Illustration showing a stream of matter spilling from a normal star (orange) toward a black hole and then forming a disc of hot gas around it. Near the black hole, intense magnetic fields accelerate some of this hot gas into tight jets that flow in opposite directions away from the black hole.