Astronomers have discovered a massive star moving extremely quickly through the outer halo of the Milky Way, and into intergalactic space. The star, named HE 0437-5439, was discovered as part of the Hamburg/ESO sky survey, and was clocked traveling at 723 km/s, or 2.6 million kilometres per hour (1.6 million miles an hour). It’s possible that the star was accelerated when it came too close to a supermassive black hole in the centre of the Large Magellanic Cloud.