Sohrab Rahvar

Astrophysicists have proposed a simple mechanism for mysterious fast radio bursts: an electrical charge builds up in the disk around a black hole, then a spark discharge occurs, producing a bright radio flash. The model is backed by observations and explains how some of the most powerful signals in

When invisible black holes pass through the Oort Cloud, they leave a trail: comets fly off in all directions, some even falling toward Earth. By comparing the actual frequency of comet appearances with calculations, scientists found that black holes a thousand times the mass of the Sun make up only