Astronomers viewing Hubble telescope images spotted a star traveling at an uncommonly fast 16 million mph, and theorized that it gained momentum after a nearby star was sucked into a vast black hole. "Studying these stars could provide more clues about the nature of some of the universe's unseen mass, and it could help astronomers better understand how galaxies form," University of Michigan researcher Oleg Gnedin said in a news release.

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