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It's totally possible (sort of)! Such stars are called - not surprisingly - intergalactic stars. These stars are often referred to as hypervelocity stars, because in order to reach galactic escape...
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#1: Attribution notice removed
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System
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2020-06-01T14:13:48Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/a/34554 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/