Researchers have released the first confirmed image of two black holes orbiting each other. The observation confirms a theory that has remained unproven for more than 40 years. The discovery centres on quasar OJ287, located five billion light-years from Earth in the constellation Cancer. Quasars are the luminous cores of distant galaxies, powered by the gravitational energy of supermassive black holes. The image shows two bright points, each representing a jet of high-energy particles emitted by one of...