hypervelocity
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Milky Way's fastest stars could be runaways from another galaxy
The fastest-moving stars in our galaxy, known as hypervelocity stars, may have a more interesting backstory than scientists first thought, according to new research from Cambridge University. Astronomers initially believed these super-rare stars -- only 20 have been identified -- had been expelled from the center of the Milky Way by a supermassive black hole, but the study shows that they may have started their breakneck journeys in another galaxy altogether: the Large Magellanic Cloud (LMC).
