A decade-long cosmic mystery has finally been solved: astronomers have traced strange, repeating radio pulses to an unusual binary star system. The signals, detected every two hours, originate from a white dwarf and a red dwarf locked in a tight orbit.

Astronomers have detected rare radio waves from a binary star system, challenging previous ideas about their origins. These pulses, lasting from milliseconds to minutes, arrive every 125.5 minutes. Scientists now believe they come from a white dwarf and red dwarf orbiting each other.

Astronomers say they have traced a mysterious pulsing in the Milky Way to a surprising source: a dead star locked in a dance with another star.