Synchronized Stars Power Cosmic Radio Laser

Researchers have helped unravel the mystery of why certain pairs of stars pulse with regular, long-period bursts of radio waves. The particular class of objects they observed come in pairs that always include a compact dead star, called a white dwarf, locked in orbit with an M dwarf, a red star smaller than our Sun. In recent years, astronomers have been puzzled by the fact that a handful of these stellar pairs pulse with radio waves every few minutes over spans of hours.