English: In this all-sky view, the camera approaches a supermassive black hole weighing 4.3 million Suns. It is about 70 million miles (113 million kilometers) from the black hole’s event horizon, the boundary of no return. It’s moving inward at 19% the speed of light — nearly 127 million mph (205 million kph). A flat, swirling cloud of hot, glowing gas called an accretion disk surrounds the black hole and serves as a visual reference during the fall, as do glowing structures called photon rings, which form closer to the black hole from light that has orbited it one or more times. A backdrop of the starry sky completes the scene.Credit: NASA's Goddard Space Flight Center/J. Schnittman and B. Powell