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rogue star
- A star that has escaped the gravitational pull of its host galaxy and is moving freely in, or toward, the intergalactic void. A star that has acquired a sufficiently high velocity to break free from the galaxy in which it formed is called a hypervelocity star. Several such stars have been found in our own Milky Way Galaxy.
- More generally, any star that is in an unusual location or state of motion.
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