Tags: Star.
WD 0137-349 is a binary star 300 light years from Earth. It is composed of a white dwarf and a brown dwarf in orbit around it. The orbital period is 2 hours. The orbit of the brown dwarf is slowly decaying.It is thought that the red giant phase of the current white dwarf was dramatically shortened from around 100 million years on average to a few decades because of the actions of the brown dwarf.