ASTROPHYSICS:
Rings of Light Could Reveal Black Holes
Robert Irion
Veteran astrophysicist John Wheeler has conjured a direct way to detect a black hole that might wander near our solar system. Sunlight would dance rings around the hole and return to Earth, briefly creating a flare in otherwise empty space. Searching for such an exceedingly rare vision might not be practical for decades, but the elegant analysis has delighted other physicists.