Matt Williams,Universe Today
Most stars in our galaxy behave predictably, orbiting around the center of the Milky Way at speeds of approximately 100 km/s (62 mi/s). But some stars achieve velocities that are significantly greater, or to the point that they are even able to escape the gravitational pull of the galaxy. These are known as hypervelocity stars (HVS),a scarce type of star that is believed to be the result of interactions a with supermassive black hole (SMBH).
The existence of HVS is something that astronomers first theorized in the late 1980s, and only 20 absorb been identified so far. But thanks to a fresh study by a team of...
Source: realclearscience.com