From unifying quantum physics and gravity to working out what is dark matter, the universe has some deep questions that ...

This process occurs near a critical boundary called the photon-sphere. Here, light follows unstable circular paths, spiraling either outward to infinity or inward toward the event horizon.

“And, almost as a bi-product of the model, we were able to produce this image of a photon, something that ... interacts with a tiny silicon sphere just one micrometer in diameter – about ...