Stars move a lot more than previously expected. University of Washington has run some simulations showing that stars like the sun could actually move a great deal withing galaxies like the milky way.
It's thrown a wrench into scientific calculations because previous models contained "habitable zones" withing galaxies that are more conducive to developing and supporting life. If stars can move, then those zones can move as well. It looks like it's time to rethink the development of life in our galaxy.
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