In the past three years, astronomers have discovered a mysterious new type of radio source. We call these long-period transients.

Astronomers have finally traced mysterious radio pulses in the Milky Way to a unique cosmic duo—a red dwarf and a white dwarf orbiting each other every two hours. This discovery challenges previous assumptions that only neutron stars produce such signals.

Astronomers have spotted a red dwarf star in a system that is almost certainly the source of a radio signal that, for a while, repeated once every 125 minutes. Moreover, there’s evidence of a white dwarf companion.

Earth has been at the receiving end of mysterious radio emissions every two hours. After more than a decade, the source of these signals has finally been identified, nearby the Big Dipper. A new research paper published in Nature Astronomy points to a red dwarf and white dwarf star,