Artist’s animation of the triple system with the closest black hole

This animation shows the orbits and movements of the objects in the HR 6819 triple system. This system includes an inner binary with one star (orbit indicated in blue) and a newly discovered black hole (orbit indicated in red). As we move away from this inner pair, we see the outer object in the system, another star in a much wider orbit (in blue). The team originally believed there were only two objects, the two stars, in the system. However, as they analysed their observations, they were stunned when th