Astronomers in astronomy have found the fastest ' unbound ' star in the galaxy . Called galaxy 708 it is moving at 500 miles ( 1,200 km ) per hour . It will leave the galaxy in about 25 million years . The star was given its rapid evolution due to its companion going supernova . It is the first star discovered to be inside the galaxy untouched by such an event .
Astronomers in Hawaii have found the fastest 'unbound ' star in the galaxy . Called US 708 it is moving at 745 miles ( 1,200km ) per second . It will leave the galaxy in about 25 million years . The star was given its rapid speed due to its companion going supernova . It is the first star found to be leaving the galaxy caused by such an event .