Smart Ducklings, Umbrella Drones, And A Cheetos-Eating Robot

In the 1980s, astronomers discovered that objects falling into black holes in our galaxy throw off flickering X-rays before they vanish. Why this happened was a mystery. A discovery by the European Space Agency's orbiting X-ray observatory, XMM-Newton (aided by NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) mission) has proved the existence of a "gravitational vortex" around a black hole, which solves the flickering mystery. The image above is an artist depiction of of the accretion disk around a black hole as the orbit of the material changes orientation around the central object.